SALAH Amroune

BOURENANE Moussa , SEDIRA Sohaib

Investigation expérimentale des facteurs influençant le processus d'impression 3D avec l'utilisation de filaments PLA fondus

BOUCHELALEG Nassereddine

Etude et réalisation par Retro conception d'une pièce à intérêt médical

Titoum Ahlam

ETUDE ET ANALYSE DES MATERIAU COMPOSITES PAR PYTHON ET ABAQUS

BEKHTI ABDENASSER , AMROUNE ABDELMALIK

Analyse Et Génération D’un G Code Dédié à L’impression 3D

Triki Abdelkarim

Etude et réalisation des pièces mécanique sur imprimante 3D

Sami Salhi

contribution à l'étude de matériau bio composite renforcé par des fïbres végétales

AGAGUENI Hassane

Contribution à I la programmation CNC avec MASTERCAM et simulation sur SinuTrain pour SINUMERIK 828D

ZEDAME Ahmed Said

Etude et réalisations d'une pièce sur machine à commande numérique TYPE Fl CNC EMCO

Hybrid composites reinforced with palm and jute fibers are increasingly valued in modern manufacturing due to their exceptional strength-to-weight ratio and eco-friendly properties. This study examines the drilling process of these hybrid composites, with a focus on circularity and cylindricity errors as key indicators of hole quality. The composite material was composed of 15 % palm fibers and 15 % jute fibers by weight. A distinguishing feature of this research is the innovative use of bootstrap analysis to quantify uncertainty in predicting circularity and cylindricity errors. The investigation explored the effects of spindle speed and feed rate on machining outcomes, uncovering intricate interdependencies between these parameters. Results show that lower spindle speeds yield more precise and consistent hole quality, while higher speeds increase variability. Two regression models were developed to predict circularity and cylindricity errors, demonstrating strong predictive accuracy with R-squared values of 0.91 and 0.95, respectively. The application of bootstrap analysis further validated the robustness of these models by providing detailed uncertainty estimates across a range of cutting conditions. Machining conditions associated with minimal errors were determined at a spindle speed of 1592 rpm and a feed rate ranging from 0.08 mm/rev to 0.12 mm/rev, yielding circularity errors as low as 44 µm and cylindricity errors of 59 µm.

Citation

Mohamed SLAMANI , SALAH Amroune , Mustapha Arslane , elhadi.abdelmalek@univ-msila.dz, , (2025-02-17), Bootstrap analysis for predicting circularity and cylindricity errors in palm/jute fiber reinforced hybrid composites, Measurement, Vol:11, Issue:22, pages:20, ELSEVIER

This study investigates the impact of cutting parameters—cutting speed (Vc), feed rate (fz), and depth of cut (ap)—on surface roughness (Ra) during the dry face milling of 25CrMo4-25 steel, using CT530 inserts and response surface methodology (RSM). Through a series of machining experiments based on statistically designed three-factor and four-level factorial experiment designs (Taguchi Design) and thorough statistical analysis of variance (ANOVA), a mathematical model was developed to identify significant factors influencing Ra. Moreover, a multi-objective optimization approach was applied to minimize Ra and maximize material removal rate (MRR) using a desirability approach. The resulting models established the relationships between cutting parameters (Vc, fz, and ap) and Ra. The analysis revealed the significance of the mathematical model for Ra (R2= 96.61%), enabling reliable prediction of surface roughness during machining of 25CrMo4-25 steel. Notably, the study found that the feed rate had the most significant impact on Ra (53.95%), followed by cutting speed contributing 38.75% to Ra. Conversely, the depth of cut had a negligible effect.

Citation

SALAH Amroune , , (2024-12-23), OPTIMIZATION OF SURFACE ROUGHNESS AND MRR WHEN MILLING 25CRMO4-25 STEEL USING TAGUCHI DESIGN, Academic Journal of Manufacturing Engineering, Vol:22, Issue:4, pages:1-10, Editura Politehnica

Materiality—the application of various materials in architecture—has been vital to the design and construction of buildings. Traditionally, materials science has catered to the needs of design, engineering, and construction professionals. The properties and characteristics of materials play a critical role in shaping buildings and affecting their performance. Innovations such as bio composites and fiber-reinforced polymers have not only advanced new construction techniques but have also revitalized interest in materials as essential components of innovative architectural design. At the same time, materials science has evolved from a discipline focused on explaining materials to one that actively designs them from the ground up. This merging of trends is giving rise to materials-based design research, where architects, engineers, and materials scientists collaborate to create new material systems and explore their applications. This review examines advancements across different material categories, including wood, natural fibers, synthetic composites, and polymers. Tensile samples manufactured from date palm fibers at ratios of 10%, 15%, 20%, 25%, and 30% with epoxy demonstrated optimal results at a fiber ratio of 25%. This highlights recent trends and innovations in the field.

Citation

SALAH Amroune , ,(2024-12-16), Innovations in the Use of Bio composites for Renovating Buildings in Architecture,VEHDD Msila,GTU M'sila

Ｔｈｉｓ ｗｏｒｋ ｐｒｅｓｅｎｔｓ ａ ｓｔｕｄｙ ｏｎ ｔｈｅ ｕｓｅ ｏｆ ｃａｔｈｏｄｉｃ ｐｒｏｔｅｃｔｉｏｎ ａｓ ａ ｍｅａｓｕｒｅ ａｇａｉｎｓｔ ｃｏｒｒｏｓｉｏｎ ｉｎ ｐｉｐｅｌｉｎｅｓ． Ｔｈｅ ｃａｔｈｏｄｉｃ ｐｒｏｔｅｃｔｉｏｎ， ｃｏｍｐｌｉａｎｔ ｗｉｔｈ ｔｈｅ ＡＰＩ ５Ｌ ｓｔａｎｄａｒｄ， ｉｓ ｉｍｐｌｅｍｅｎｔｅｄ ｈｅｒｅ ｂｙ ａｐｐｌｙｉｎｇ ａｎ ｉｍｐｒｅｓｓｅｄ ｃｕｒｒｅｎｔ， ｗｈｉｌｅ ｃａｒｅｆｕｌｌｙ ｃｏｎｓｉｄｅｒｉｎｇ ｓｅｖｅｒａｌ ｅｓｓｅｎｔｉａｌ ｖａｒｉａｂｌｅｓ， ｓｕｃｈ ａｓ ｓｏｉｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ， ｔｈｅ ｔｙｐｅ ａｎｄ ｃｏｌｏｒ ｏｆ ｔｈｅ ｐｉｐｅｌｉｎｅ ｍａｔｅｒｉａｌ，ａｓ ｗｅｌｌ ａｓ ｔｈｅ ｐｌａｃｅｍｅｎｔ ａｎｄ ｓｉｚｅ ｏｆ ｔｈｅ ａｎｏｄｅ． Ｔｈｅｒｅｆｏｒｅ， ｉｔ ｉｓ ｃｒｕｃｉａｌ ｔｏ ｏｐｔｉｍｉｚｅ ｔｈｅ ｌｏｃａｔｉｏｎ ａｎｄ ｖａｌｕｅｓ ｏｆ ａｎｏｄｉｃ ｏｖｅｒｆｌｏｗｓ ｏｒ ｇｒｏｕｎｄ ｒｅｓｉｓｔａｎｃｅｓ ｔｏ ｅｎｓｕｒｅ ａ ｕｎｉｆｏｒｍ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｐｏｔｅｎｔｉａｌ ａｃｒｏｓｓ ｔｈｅ ｅｎｔｉｒｅ ｓｔｒｕｃｔｕｒｅ． Ｉｎ ｔｈｉｓ ｍｅｔｈｏｄ，ｉｍｐｒｅｓｓｅｄ ｃｕｒｒｅｎｔ ｐｒｏｔｅｃｔｉｏｎ ｕｓｅｓ ａｎ ａｕｘｉｌｉａｒｙ ａｎｏｄｅ ａｎｄ ａｎ ｅｘｔｅｒｎａｌ ｄｉｒｅｃｔ ｃｕｒｒｅｎｔ ｓｏｕｒｃｅ ｔｏ ｉｎｄｕｃｅ ａ ｃｕｒｒｅｎｔ ｔｈｒｏｕｇｈ ｔｈｅ ｅｌｅｃｔｒｏｌｙｔｅ ａｎｄ ｔｈｅ ｐｉｐｅｌｉｎｅ， ｔｈｕｓ ｃｏｕｎｔｅｒｉｎｇ ｔｈｅ ｒｅｓｉｓｔａｎｃｅ ｏｆ ｔｈｅ ｓｔｅｅｌ． Ｔｈｉｓ ａｐｐｒｏａｃｈ ｉｓ ａｄｖａｎｔａｇｅｏｕｓ ａｓ ｉｔ ａｌｌｏｗｓ ｆｏｒ ｔｈｅ ａｄｊｕｓｔｍｅｎｔ ｏｆ ｅｌｅｃｔｒｉｃａｌ ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ， ｐａｒｔｉｃｕｌａｒｌｙ ｃｕｒｒｅｎｔ ｌｅｖｅｌｓ， ｔｏ ｍｅｅｔ ｓｐｅｃｉｆｉｃ ｎｅｅｄｓ． Ｔｈｅ ｆａｃｔｏｒｓ ｅｓｓｅｎｔｉａｌ ｔｏ ｔｈｅ ｅｆｆｅｃｔｉｖｅｎｅｓｓ ｏｆ ｃａｔｈｏｄｉｃ ｐｒｏｔｅｃｔｉｏｎ ｓｙｓｔｅｍｓ， ｗｈｉｃｈ ｏｐｔｉｍｉｚｅ ｔｈｅ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｐｒｏｔｅｃｔｉｏｎ ｐｏｔｅｎｔｉａｌ ａｃｒｏｓｓ ｔｈｅ ｓｔｒｕｃｔｕｒｅ，ｌａｒｇｅｌｙ ｄｅｐｅｎｄ ｏｎ ｔｈｅ ｐｒｅｃｉｓｅ ｍａｎａｇｅｍｅｎｔ ｏｆ ｇｒｏｕｎｄ ｒｅｓｉｓｔａｎｃｅｓ ｄｕｒｉｎｇ ａｎｏｄｉｃ ｄｉｓｃｈａｒｇｅ， ｐａｒｔｉｃｕｌａｒｌｙ ｔｈｅ ａｔｔｅｎｕａｔｉｏｎ ｃｏｅｆｆｉｃｉｅｎｔ （ α）． Ｔｈｅｓｅ ｆａｃｔｏｒｓ ｗｅｒｅ ｓｔｕｄｉｅｄ， ａｎｄ ｔｈｅ ｒｅｓｕｌｔｓ ｏｂｔａｉｎｅｄ ｗｅｒｅ ｐｒｅｓｅｎｔｅｄ ａｎｄ ｄｉｓｃｕｓｓｅｄ ｂａｓｅｄ ｏｎ ｔｈｅｉｒ ｉｎｆｌｕｅｎｃｅ

Citation

SAID Zergane , SALAH Amroune , Chouki FARSI , Azzedine BENYAHIA , barhm.mohamad@epu.edu.iq, , (2024-12-13), Evolution of the Electric potential for the Cathodic Protection of Pipelines According to the Variation of the imposed current, Journal of harbin institute of technology (New Series), Vol:9, Issue:11, pages:9, Journal of harbin institute of technology- Harbin Institute of Technology

Currently, the extensive use of petroleum-based plastics creates significant v challenges that affect society broadly. To address these challenges and shift towards more sustainable alternatives, substantial research is being invested in developing biopolymer matrix composites and bio-based reinforcements from renewable resources. Among these potential materials, cellulosic fibers derived from date palm offer notable advantages such as affordability, low density, and properties similar to synthetic fibers, making them suitable for a variety of applications. Despite these benefits, date palm fibers are not fully utilized, with many parts of the plant remaining underexploited. This abstract outlines a manual method for extracting fibers and fibrils from date palm clusters. Palm fiber composites present a promising and sustainable alternative for construction materials in mechanical structures, combining durability with lightness and providing significant environmental benefits. Their flexibility makes them appropriate for diverse construction uses. This paper examines the mechanical properties and potential impacts of these natural fiber-reinforced composites in the context of sustainable mechanical practices.

Citation

SALAH Amroune , ,(2024-12-09), Palm fiber composites as innovative, sustainable materials for mechanical applications,The 3rd National Environment & Sustainable Management Seminar,Mostaganem - Algeria

In the manufacturing of composite materials, achieving high precision in drilling processes is crucial to ensure product quality and performance. This study investigates the influence of drilling parameters on key performance metrics delamination, circularity, and cylindricity using the Taguchi method. An L25 orthogonal array was employed to systematically explore the effects of spindle speed, feed, and drill type on the quality of drilled holes. The analysis of variance (ANOVA) revealed that feed significantly influences the outcomes across all drill materials, with cutting speed playing a secondary role. The study further applied desirability function analysis (DFA) to optimize these multi-responses, identifying the optimal parameter settings for each drill type. The results highlight the critical role of feed in minimizing delamination, circularity, and cylindricity with the optimal settings offering significant improvements in drilling performance.

Citation

SALAH Amroune , ADMIN Admin , Mohamed SLAMANI , ADMIN Admin , Abdelmalek ELHADI , ADMIN Admin , Mustapha Arslane , ADMIN Admin , , (2024-11-28), Multi-response optimization of drilling parameters in hybrid natural fiber composites using Taguchi and desirability function analysis (DFA), International Journal of Advanced Manufacturing Technology, Vol:135, Issue:2, pages:5631–5645, Springer

Green composites consisting of renewable or biodegradable materials are becoming more popular as environmental awareness of global waste issues grows. Among them, natural composites made of polymers have proven to work exceptionally well because of their high strength, rapid breakdown after disposal, and simplicity in processing using standard techniques. In particular, competitive mechanical performances have been demonstrated by green composites having a polymer matrix reinforced with sisal, luffa, and maize fibers at different fiber percentages of 10%, 15%, and 25%. The tensile characteristics of polymer composites reinforced with these fibers are optimized in this study by the application of Taguchi and response surface methodology. By assessing characteristics such as section size, fiber content, and fiber type simultaneously, the study attempts to produce optimal biocomposite qualities, which are then experimentally tested. Tensile tests show considerable gains: the biocomposite containing 15% corn fiber showed a 21.04% increase in tensile strength. Similarly, sisal, luffa, and corn fibers all showed notable improvements in Young’s modulus, with the biocomposite showing 22.77%, 31.77%, and 20.25% increases, respectively.

Citation

SALAH Amroune , , (2024-11-18), Enhancing the Mechanical Characteristics of Eco-Friendly Composite Materials: Taguchi and RSM Optimization., Journal of natural fibers, Vol:21, Issue:1, pages:1-28, Taylor and Francis

The study examines Cu-Zn-Al shape memory alloys, vital in aeronautics and automotive sectors. It aims to characterize their thermo-mechanical transformations induced by composition and heat treatments, focusing on how these impact mechanical properties, especially grain size refinement. Analysis covers transformation temperatures, micro-hardness, induced transformations, and mechanical tests. Results show thermoplastic martensitic transformations, with micro-hardness aiding in identifying characteristic points. The study's novelty lies in understanding how grain size refinement affects these transformations and the role of microhardness in precise characterization

Citation

SAID Zergane , Hocine MAKRI , SALAH Amroune , Cherif saib , , (2024-11-13), ELABORATION AND CHARACTERIZATION OF CU-ZN-AL SHAPE MEMORY ALLOYS, Pollack Periodica, Vol:1210, Issue:7, pages:15, Pollack Periodica-Akademiai Kiado

Over the past two decades, plant fibers have emerged as a compelling and environmentally friendly alternative to glass fibers in organic matrix composites. This shift is largely due to the significant growth potential of plant fibers in the industrial sector. The use of natural fibers as reinforcement in polymer matrix composites has garnered increasing attention from researchers and industrialists, driven by both economic and environmental considerations. In our research, we developed composite materials by reinforcing polymers with loofah, corn, and sisal fibers at different ratios of 10%, 15%, and 25%. We then subjected these composites to tensile testing for characterization. The results indicate that incorporating plant fibers enhances both tensile strength and strain properties, with tensile strength increasing notably at the 15% fiber ratio. This improvement is attributed to better adhesion between the polymer and the fiber, and composites reinforced with corn fibers showed a significant increase in tensile strength compared to those reinforced with loofah and sisal fibers. This study employs response surface methodology (RSM) to optimize the tensile properties of polymer composites reinforced with these fibers

Citation

SALAH Amroune , ,(2024-10-30), Influence of Fiber Loading Rate on the Tensile Strength of Polymer Composites Reinforced with Sisal, Corn, and Luffa Fibers and used RSM optimization,The 1st International Conference on Technological Applications of Materials (ICTAM'24),Setif

In the aeronautical construction several rivet holes are drilled, these holes constitute stress concentration zones which can be affects the fatigue life through cracks initiation at the edge of rivet holes. To remedy this problem and minimize stress level in these zones, the cold expansion technique is used to enhancing the fatigue life of rivet holes. The present work aims to investigate through finite element analysis the effect of three degree cold expansion (2%, 4.5% and 6%) on the reduction of stress level on the edge of rivet hole. The hole-crack interaction effect was thus analyzed. This effect is quantified by the values of J-Integral at the two tip of crack. The obtained results show that negative values of J-Integral was found which can be explained by the beneficial effect of residual compressive stresses induced by cold expansion on the crack closing.

Citation

SALAH Amroune , , (2024-10-10), NUMERICAL ANALYSIS REVEALS COLD EXPANSION'S INFLUENCE ON RIVET HOLE STRESS AND J-INTEGRAL VALUES, Academic Journal of Manufacturing Engineering, Vol:22, Issue:3, pages:129-140, Editura Politehnica

The study of the mechanical strength of adhesives remains an important area of research for researchers. These adhesives must be prepared in the form of mass test pieces to characterize them under different mechanical stresses. However, during the preparation of the test pieces several defects are likely to be present, namely air bubbles, cavities, or impurities. The behavior of the adhesive differs depending on the presence of one of these defects and, in most cases, the real behavior of the adhesive is not precisely known. For this purpose, several tests are necessary to have a close estimate of the adhesive's behavior. To numerically model the behavior of the adhesive it is necessary to consider the presence of these types of defects. This paper proposes a damage criterion based on the Rousselier model, which describes the damage due to crack growth from the presence of cavities in an adhesive, assumed as a ductile material. The proposed damage model was developed and implemented in a user-defined subroutine in the ABAQUS finite element code. Other damage models integrated into ABAQUS were used. In addition, the extended finite element method (XFEM) was used in the numerical simulations to study automatic damage modelling by the appearance and propagation of cracks in highly stressed areas. The main objective of this work is an analysis by the finite element method to determine the elastoplastic behavior coupled with the damage in the mass adhesive, considering the size, position, and shape of the defect (porosities) by the proposed models. Initially, experimental tests were carried out on mass specimens of adhesive to characterize the tensile response and to determine their mechanical properties depending on the position and size of the defect, which may exist in the specimen following its fabrication. The numerical results were validated by uniaxial tensile tests on the mass adhesive. Comparisons with the damage models integrated into ABAQUS have proven their effectiveness in predicting the behavior of the adhesive in the presence of a cavity.

Citation

SALAH Amroune , , (2024-10-10), Prediction of mass adhesive damage based on the Rousselier model: Experimental and numerical analysis, International Journal of Adhesion and Adhesives, Vol:136, Issue:6, pages:103852, Elsiver

Presently, Functionally Graded Materials (FGMs) are extensively utilised in several industrial sectors, and the modelling of their mechanical behaviour is consistently advancing. Most studies investigate the impact of layers on the mechanical characteristics, resulting in a discontinuity in the material. In the present study, the extended Finite Element Method (XFEM) technique is used to analyse the damage in a Metal/Ceramic plate (FGM-Al/SiC) with a circular central notch. The plate is subjected to a uniaxial tensile force. The maximum stress criterion was employed for fracture initiation and the energy criterion for its propagation and evolution. The FGM (Al/SiC) structure is graded based on its thickness using a modified power law. The plastic characteristics of the structure were estimated using the Tamura-Tomota-Ozawa (TTO) model in a user-defined field variables (USDFLD) subroutine. Validation of the numerical model in the form of a stress-strain curve with the findings of the experimental tests was established following a mesh sensitivity investigation and demonstrated good convergence. The influence of the notch dimensions and gradation exponent on the structural response and damage development was also explored. Additionally, force-displacement curves were employed to display the data, highlighting the fracture propagation pattern within the FGM structure.

Citation

SALAH Amroune , , (2024-10-10), Predicting Damage in Notched Functionally Graded Materials Plates through extended Finite Element Method based on computational simulations, Frattura ed Integrità Strutturale, Vol:18, Issue:70, pages:1-28, Frattura

Composite materials find extensive usage in industrial applications. Howeer, they are susceptible to gradual damage over time. In this study, we explored the cracking processes in jute fiber-reinforced composite sheets subjected to uniaxial tension at varying displacement speeds (10, 20, and 30 mm/min) using Abaqus software. The composite plate dimensions are 25×35×10 mm³, with a 7 mm crack length. Our findings indicate that crack propagation in vehicle plates is influenced by mechanical properties relative to load, specifically through increased travel speed. We observed stress concentration around the crack, and the displacement speed significantly affects crack behavior. The cohesive J-integral was derived through finite element analysis, revealing a 90.90% relative error in the mean absolute value ΔJ across the five integral paths for the two sample types. Subsequently, five potential end conditions were assessed for further analysis, considering different boundary conditions: Simply supported (SSSS), two opposing sides clamped (SFSF), Clamped-Simply-ClampedSimply (SCSC), two opposing sides clamped (CFCF), and all sides clamped (CCCC). Additionally, three different types of tensile actions in the y-direction were considered

Citation

SAID Zergane , MOUSSA Zaoui , SALAH Amroune , Chouki FARSI , ADMIN Admin , , (2024-10-02), NUMERICAL INVESTIGATION OF THE EFFECT OF FORCES ON THE PROCESS CRACK IN A COMPOSITE PLATE, Academic Journal of Manufacturing Engineering, Vol:22, Issue:3, pages:8, Academic Journal of Manufacturing Engineering- Editura Politehnica

Purpose The purpose of this research is to evaluate the effectiveness of different repair patch materials in reducing the stresses at the crack tip of a 2024-T3 aluminum plate. This involves a numerical analysis using the finite element method (FEM) to estimate the reduction in the J-integral value, with the goal of identifying how various parameters related to the patch materials, adhesive properties and loading conditions influence the structural integrity of the repaired plate. Design/methodology/approach The methodology of this research involves conducting a numerical analysis using the FEM to estimate the reduction in the J-integral value at the crack tip of a 2024-T3 aluminum plate. Three types of patches – metal, composite and functionally graded material (FGM) – were examined under tensile loading conditions, and Adekit-A140 adhesive was used to bond these repair patches to the aluminum plate. Findings The analysis considered various parameters, including crack length, the nature of fibers in the composite material, the gradation exponent for FGM patches and the nature of the face in contact with the adhesive for the FGM patch. Additionally, stress analysis was conducted, examining the J-integral values for the plate, shear stress in the adhesive layer and peel stress in the composite patch. The findings highlight that modifying the nature of the repair patch used can significantly enhance the structural integrity of the repaired plate. Originality/value The study analyzed J-integral values, shear stress in the adhesive and peel stress in the composite patch. Various parameters, including crack length, fiber type, gradation exponent and adhesive contact face nature, were considered. Results demonstrate that the J-integral value can be significantly reduced by altering the repair patch type, highlighting the effectiveness of customized patch materials in enhancing structural integrity.

Citation

SALAH Amroune , , (2024-10-01), Effect of repair patch nature on J-integral reduction in notched plates, International Journal of Structural Integrity, Vol:15, Issue:6, pages:1-22, EMERALD GROUP PUBLISHING LTD

This study explores the enhancement of sustainability and mechanical performance in 3D printing filaments through the incorporation of palm fiber reinforcement. By integrating natural fibers into polymer-based filaments, the research aims to develop eco-friendly materials with improved strength, stiffness, and durability. Experimental testing and characterization are conducted to evaluate the mechanical properties of the reinforced filaments, while the effects of fiber content and distribution are analyzed through microscopic examination. The findings demonstrate that palm fiber reinforcement significantly enhances the mechanical properties of 3D printed structures, offering a promising alternative for sustainable additive manufacturing applications.

Citation

SALAH Amroune , ,(2024-09-25), Enhancing Sustainability and Mechanical Performance of 3D Printing Filaments through Palm Fiber Reinforcement,6th International Conference on Applied Engineering and Natural Sciences,Konya/Turkey

This paper aims to strengthen composites by treated and untreated date palm fibers (PDF), with sodium hydroxide (NaOH), for light applications. With 75% cellulose content and a density of 1.2 g/cm3, the palm fibers were exposed to a preparatory treatment with 1.5% NaOH for 24 h prior to integration into a polyester. Four polyester samples comprising 30% of palm fiber were manufactured. Additionally, the palm fiber interface was evaluated using scanning electron microscopy (SEM) and optical microscopy. The specimens underwent mechanical testing and it shows that tensile (18% increase in stress and 1.2% increase in Young’s modulus) and flexural properties (20% increase in strength and 10% increase in Young’s modulus) of treated composites as compared with untreated fibers. A MATLAB-based Artificial Neural Network (ANN) model was applied to estimate stress and strain at break as well as the Young’s modulus, based on three input characteristics: section, sample length, and chemical treatment. It was obtained that the polyester reinforced by NaOH-treated palm fibers increased the mechanical characteristics relative to the untreated fibers. The coefficient of determination R2 in the ANN models is 0.87. These results suggest that the ANN model is a useful tool for predicting mechanical properties.

Citation

SALAH Amroune , , (2024-09-21), Investigation on the Mechanical Behavior of Date Palm Fibers Reinforced Composites: Predictive Modelling Using Artificial Neural Networks (ANNs), Journal of natural fibers, Vol:21, Issue:1, pages:1-28, Taylor and Francis

This paper presents a numerical study of natural convection in an annular cavity filled with a hybrid nanofluid under the influence of a magnetic field. This study is significant for applications requiring enhanced thermal management, such as in heat exchangers, electronics cooling, and energy systems. The inner cylinder, equipped with fins and subjected to uniform volumetric heat generation, contrasts with the adiabatic outer cylinder. This study aims to investigate how different nanoparticle combinations (Fe3O4 with Cu, Ag, and Al2O3) and varying Hartmann and Rayleigh numbers impact heat transfer efficiency. The finite volume method is employed to solve the governing equations, with simulations conducted using Fluent 6.3.26. Parameters such as volume fraction (ϕ2 = 0.001, 0.004, 0.006), Hartmann number (0 ≤ Ha ≤ 100), Rayleigh number (3 × 103 ≤ Ra ≤ 2.4 × 104), and fin number (N = 0, 2, 4, 6, 8) are analyzed. Streamlines, isotherms, and induced magnetic field contours are utilized to assess flow structure and heat transfer. The results reveal that increasing the Rayleigh number and magnetic field enhances heat transfer, while the presence of fins, especially at N = 2, may inhibit convection currents and reduce heat transfer efficiency. These findings provide valuable insights into optimizing nanofluid-based cooling systems and highlight the trade-offs in incorporating fins in thermal management designs.

Citation

SALAH Amroune , ADMIN Admin , Souad BENKHERBACHE , ADMIN Admin , SAID Zergane , ADMIN Admin , , (2024-09-19), Numerical Analysis of Natural Convection in an Annular Cavity filled with Hybrid Nanofluids Under Magnetic Field, Energies, Vol:17, Issue:18, pages:4671, Multidisciplinary Digital Publishing Institute (MDPI)

Composite materials find extensive usage, but they are susceptible to gradual damage over time. In this study, we explored the cracking processes in jute fiber-reinforced composite sheets subjected to uniaxial tension at varying displacement speeds (10, 20, and 30 mm/min) using Abaqus software. The composite plate dimensions are 25× 35× 10 mm³, with a 7 mm crack length. Our findings indicate that crack propagation in vehicle plates is influenced by mechanical properties relative to load, specifically through increased travel speed. We observed stress concentration around the crack, and the displacement speed significantly affects crack behavior. The cohesive J-integral was derived through finite element analysis, revealing a 90.90% relative error in the mean absolute value ΔJ across the five integral paths for the two sample types. Subsequently, five potential end conditions were assessed for further analysis, considering different boundary conditions: Simply supported (SSSS), two opposing sides clamped (SFSF), Clamped-Simply-Clamped-Simply (SCSC), two opposing sides clamped (CFCF), and all sides clamped (CCCC). Additionally, three different types of tensile actions in the y-direction were considered.

Citation

SALAH Amroune , , (2024-09-09), NUMERICAL INVESTIGATION OF THE EFFECT OF FORCES ON THE PROCESS CRACK IN A COMPOSITE PLATE, Academic Journal of Manufacturing Engineering, Vol:22, Issue:3, pages:1-10, Editura Politehnica

This study investigates the effects of employing a multi-perforation cooling system on crossflow interactions, utilizing both numerical simulations and experimental methods. A 30° inclined multi-perforation cooling system is applied on a heated flat plate as part of the experimental setup. Large Eddy Simulation (LES) is utilized for Computational Fluid Dynamics (CFD) calculations to analyze the impact of multi-perforation on heat transfer dynamics. Validation is conducted by comparing the results with experimental investigations. The study encompasses both aerodynamic and thermal considerations, employing Particle Image Velocimetry (PIV) and infrared techniques for analysis, while wall heat flux is measured using electrical discharge. Experimental data on film cooling are collected through these methods, focusing on the impact of blowing ratio (M) and the number of open jet rows (R). The LES-based CFD simulations accurately predict the trajectory of the cooling film. Notably, the influence of flow through the multi-perforation on the primary flow is observable across both configurations of open jet rows (4R and 8R near the wall). The outcomes substantiate the formation of a cooling film emanating from the jet’s fourth row (4R configuration), thereby validating the LES simulations. Visualization of wall temperatures illustrates the formation of a cooling film, discernible through the visible heat distribution from row 4R. However, discrepancies arise in predicting the adiabatic cooling efficiency towards the exit of the 4R region and the commencement of the 8R region, potentially attributed to the alterations induced by the additional multi-perforated injection. The novelty and the main objective of this study is to evaluate the impact of the variation of geometric parameters between the jets and the main flow on the dispersion of the jets themselves. A novel function, tailored to the temperature evolution of the cooling gas, is employed for data analysis. Two geometry configurations, featuring varying open hole areas, are evaluated. The film-cooled heat transfer coefficient, depicted by the Nusselt number, and the adiabatic film cooling efficiency results, serve to appraise the film cooling efficacy of the configurations.

Citation

SALAH Amroune , ADMIN Admin , Amar BERKACHE , ADMIN Admin , , (2024-09-01), Investigating crossflow interactions in multi-perforation cooling systems: Experimental and numerical insights, Applied Thermal Engineering, Vol:252, Issue:4, pages:123681, Elsiver

This study presents a method for modelling, predicting, and evaluating the impact of drill materials on the drilling process of hybrid palm/jute polyester composites, with the aim of enhancing hole quality regarding delamination, circularity, and cylindricity. Three drill materials, including High-Speed Steel (HSS), 5 % Cobalt-coated High-Speed Steel (HSS-Co5), and Solid Carbide drills were tested, and their impacts on drilling performance were assessed. Through thorough experimentation and statistical analysis, significant differences in results were observed between HSS drills and both HSS-Co5 and Solid Carbide drills. However, the variation in results between HSS-Co5 and Solid Carbide drill results was minimal. Additionally, the findings highlight notable disparities among drill types concerning uncertainty. The results also indicate that feed rate, drill material, and their interaction play crucial roles in determining drilling efficiency. Specifically, HSS drills consistently outperformed HSS-Co5 and Solid carbide drills, demonstrating superior performance in minimizing delamination, improving circularity, and enhancing cylindricity along with lower uncertainty.

Citation

Mohamed SALMI , Abdelmalek ELHADI , SALAH Amroune , Mustapha Arslane , , (2024-08-26), Investigating the impact of drill material on hole quality in jute/palm fiber reinforced hybrid composite drilling with uncertainty analysis, Heliyon, Vol:10, Issue:17, pages:25, ELSEVIER

This paper rigorously examines drilling operations in a jute/palm fiber reinforced polyester composite (15 % palm fibers, 15 % jute fibers, 70 % polyester resin, 9 mm thickness), emphasizing factors affecting hole quality. The hole quality was characterized by assessing circularity, cylindricity, and delamination. The key findings include the identification of optimal cutting conditions, where a feed rate of 0.08 mm/rev and a spindle speed of 1592 rpm maximize circularity and cylindricity. Furthermore, a lower feed rate (0.04 mm/rev) to be optimal for minimizing delamination, circularity and cylindricity, underscoring the significance of precise adjustments. The influence of drill types is highlighted, with the High-Speed Steel twist drill emerging as the superior choice, demonstrating enhanced performance. The study also reveals the sensitivity of delamination to feed rate variations, emphasizing its primary role in material damage. Cyclical trends in circularity and cylindricity are observed, with feed rate standing out as the predominant factor affecting precision.

Citation

Abdelmalek ELHADI , Mohamed SLAMANI , SALAH Amroune , Mustapha Arslane , , (2024-08-15), Precision drilling optimization in jute/palm fiber reinforced hybrid composites, Measurement, Vol:236, Issue:115066, pages:25, ELSEVIER

This study aims to enhance the mechanical properties of date palm fibers (DPFs) by implementing a targeted treatment technique. The response surface methodology (RSM) is utilized for modeling and optimizing. The study seeks to identify the optimal Alkaline treatment settings for improving the mechanical properties of DPFs by carefully analyzing parameters such as average diameter, time, and NaOH concentration. The analytical results offer valuable insights into the possible use of DPFs in many engineering applications, contributing to the industrial advancement of sustainable and eco-friendly materials. The experimental findings are analyzed using a full-factorial design (43), incorporating analysis of variance and RSM. Combining RSM and desirability function is used to get the best mechanical properties, including stress, strain, and Young’s modulus. The model appropriateness is evaluated by analyzing residual values. The findings suggest that the sodium hydroxide concentration (%NaOH) has the most significant impact on strain (11.63%), stress (12%), and Young’s modulus (11.72%) besides the time t (h) also significantly influences 6.01%, 6.26%, and 5.79% strain, stress, and Young’s modulus, respectively.

Citation

SALAH Amroune , , (2024-07-30), Modeling and Optimizing the Alkaline Treatment Process to Enhance the Date Palm Fibers’ Tensile Mechanical Properties Using RSM, Journal of natural fibers, Vol:21, Issue:1, pages:1-29, Taylor and Francis

This study investigates interactions between discrete coolant jets in a transverse flow, as seen in turbine blade cooling. Numerical solutions and specific turbulence modeling aim to replicate the scenario accurately. Comparing outcomes from two turbulence models reveals differences near the wall due to jet injection at a 45-degree angle with a sub-unity blowing rate. Researchers intend to identify these distinctions via data analysis and simulation review. Insights into coolant behavior and the importance of precise turbulence modeling are highlighted, benefiting turbine blade cooling system design and efficiency. Lessons for diverse engineering applications with transverse flows are emphasized, along-side the need to advance turbulence modeling for accurate simulations. Overall, the study advances understanding of complex turbine blade cooling, emphasizing analysis, simulations, and accurate modeling for engineering insights.

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SALAH Amroune , ADMIN Admin , Amar BERKACHE , ADMIN Admin , , (2024-07-08), EXPLORATION OF THE COMPUTATIONAL CLOSURE TECHNIQUES APPLIED TO ANALYZE THE FILM COOLING PROCESS OF THE TURBINE BLADES, Academic Journal of Manufacturing Engineering, Vol:22, Issue:2, pages:57-65, Editura Politehnica

This project focuses on the examination and design of a medically relevant component, specifically a dental prosthesis, using the method of reverse engineering. Reverse engineering involves a thorough analysis of an existing piece to understand its functioning and specifications, with the aim of creating an improved or adapted version. In the medical context, this approach is employed to develop a specific component with medical significance. This study explores the steps of this process, emphasizing detailed understanding, design, and implementation of this dental prosthesis, with a particular focus on its utility and importance in the medical field

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SAID Zergane , Mohamed SLAMANI , SALAH Amroune , MOUSSA Zaoui , Chouki FARSI , , (2024-07-06), EXAMINING AND DEVELOPING A MEDICALLY RELEVANT COMPONENT THROUGH REVERSE ENGINEERING, Academic Journal of Manufacturing Engineering, Vol:22, Issue:2, pages:7, Academic Journal of Manufacturing Engineering- Editura Politehnica

This study systematically examines how different fiber contents—Diss, Sisal, and luffa—affect the mechanical properties of bio-composites at rates of 10%, 15%, and 25%, with a particular focus on water absorption behavior. It investigates the relationship between water absorption and bending behavior, utilizing response surface methodology (RSM) optimization and analysis of variance (ANOVA) to thoroughly analyze input parameters, including a 44-day absorption duration, fiber type, and fiber content. The findings reveal that sisal-reinforced composites demonstrate the highest flexural strength, with an average stress of 31.15 ± 1.82 MPa for a 10% sisal fiber rate. However, an increase in fiber content leads to a decrease in mechanical properties and an increase in water absorption, with water absorption ratios of 2%, 3% and 5% for sisal biocomposites at fiber rates of 10%, 15% and 25%, respectively. The study’s reliability is confirmed by a significant R-squared coefficient of 0.94, indicating strong consistency between predicted and observed results. This comprehensive investigation offers valuable insights into how varying fiber content impacts both mechanical performance and water absorption in fiber-reinforced composites.

Citation

SALAH Amroune , , (2024-06-17), Optimizing water Absorption’s influence on composite mechanics through response surface methodology, Journal of Composite Materials, Vol:58, Issue:21, pages:1-28, Weily

Our study focuses on the critical steps of balancing and maintaining the turbine rotor in electricity production companies. We aim to develop a MATLAB program for blade distribution to optimize the turbine's performance. We conducted practical tests using the BLADIS software from a major company in the field and compared it with the test data from our program. We performed three blade distribution experiments using the initial static moment values of each blade, which the MEI Company's (Sonelgaz-M'sila) electronic balance provided. Our main objective is to propose a new algorithm for turbine rotor blade distribution using a MATLAB subroutine that remains applicable during maintenance operations, including punctual blade changes. This proposed algorithm will help improve the turbine rotor's efficiency and performance. Electricity production companies to maintain their turbines and optimize energy output can use our study’s findings and algorithm. By implementing our proposed algorithm, companies can save costs and increase their energy efficiency, making them more competitive in the market.

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SALAH Amroune , , (2024-06-05), AN ALGORITHMIC APPROACH FOR THE DISTRIBUTION OF THE BLADES OF A GAS TURBINE ROTOR, Academic Journal of Manufacturing Engineering, Vol:22, Issue:2, pages:33-42, Editura Politehnica

Adhesive bonding is currently widely used in many industrial fields, particularly in the aeronautics sector. Despite its advantages over mechanical joints such as riveting and welding, adhesive bonding is mostly used for secondary structures due to its low peel strength; especially if it is simultaneously exposed to temperature and humidity; and often presence of bonding defects. In fact, during joint preparation, several types of defects can be introduced into the adhesive layer such as air bubbles, cavities, or cracks, which induce stress concentrations potentially leading to premature failure. Indeed, the presence of defects in the adhesive joint has a significant effect on adhesive stresses, which emphasizes the need for a good surface treatment. The research in this field is aimed at minimizing the stresses in the adhesive joint at its free edges by geometric modifications of the ovelapping part and/or by changing the nature of the substrates. In this study, the finite element method is used to describe the mechanical behavior of bonded joints. Thus, a three-dimensional model is made to analyze the effect of defects in the adhesive joint at areas of high stress concentrations. The analysis consists of estimating the different stresses in an adhesive joint between two 2024-T3 aluminum plates. Two types of single lap joints (SLJ) were analyzed: a standard SLJ and another modified by removing 0.2 mm of material from the thickness of one plate along the overlap length, taking into account several factors such as the applied load, shape, size and position of the defect. The obtained results clearly show that the presence of a bonding defect significantly affects stresses in the adhesive joint, which become important if the joint is subjected to a higher applied load. On the other hand, the geometric modification made to the plate considerably reduces the various stresses in the adhesive joint even in the presence of a bonding defect.

Citation

SALAH Amroune , , (2024-05-20), Effect of modifying the thickness of the plate at the level of the overlap length in the presence of bonding defects on the strength of an adhesive joint, Advances in Aircraft and Spacecraft Science, Vol:11, Issue:1, pages:83-103, TECHNO-PRESS

In recent years, the implementation of rotary friction welding technology in the industrial sector has made significant progress, especially in the automotive industry, where multiple sheets forming the bodywork of a single vehicle are now assembled using this process. In this study, we utilized the phenomenon of rotary friction to enhance the quality of welded parts at different rotational speeds. Measurements of stress values, microhardness, and temperature were conducted in the welding zones for the following combinations: A60 steel/A60 steel, A9 aluminum/A9 aluminum, and their combination A60/A9. The results from each pair of welded plates were compared to achieve a comprehensive characterization.

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SALAH Amroune , ADMIN Admin , Chouki FARSI , ADMIN Admin , SAID Zergane , ADMIN Admin , , (2024-05-06), INFLUENCE OF THE ROTATION SPEED OF ROTARY FRICTION WELDING ON THE MICRO-HARDNESS OF FIXED AND MOBILE WELDED PARTS, Academic Journal of Manufacturing Engineering, Vol:22, Issue:2, pages:93-98, Editura Politehnica

The continuous evolution of composite materials has sparked increasing interest in more precise and reproducible testing methods. The use of Computer Numerical Control (CNC) to create molds for composite material tensile specimens represents a significant advancement in this field. This innovative approach ensures enhanced precision, uniformity in sample fabrication, and efficient adaptation to the specific requirements of composite materials. This article focuses on the CNC mold creation process for composite material tensile specimens, highlighting its advantages and advancements in the field of material testing.

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SALAH Amroune , ADMIN Admin , Mohamed SLAMANI , ADMIN Admin , , (2024-05-06), FABRICATING A MOLD USING CNC TECHNOLOGY FOR COMPOSITE MATERIAL TENSILE TEST SAMPLES, Academic Journal of Manufacturing Engineering, Vol:22, Issue:2, pages:66-73, Editura Politehnica

The study analyzes stresses and boundary conditions in unidirectional jute-reinforced polymer composites using tensile testing and finite element modeling. The objective is to examine the mechanical behavior of the material by determining the stress distribution under load. Experimental tests are conducted to measure tensile strength, while numerical simulation helps to better understand the effects of boundary conditions on composite performance. The results highlight the influence of fiber configuration and interfacial stresses on the material’s response.

Citation

SALAH Amroune , ,(2024-05-06), Analysis of Stresses and Boundary Conditions in Unidirectional Jute-Reinforced Polymer Composites: A Tensile Testing Approach and Finite Element Modeling,Le 2ème colloque national de chimie (CNC2@2024),M'sila

This study concentrated on utilizing fused deposition modeling for both rapid prototyping and manufacturing, specifically examining the influence of extruder temperature, infill density, and mass on the tensile strength of polylactic acid (PLA) samples. Following ASTM D-638 tensile standards, 27 samples were 3D printed and evaluated using an Anycubic i3 Mega printer. Findings indicated a minimal impact of extruder temperature on tensile strength, a significant influence of infill density, and a negligible effect of mass. Additionally, an artificial neural network (ANN) predictive model was developed. The findings demonstrated a robust correlation (91.03%) with experimental data for all data points utilizing the ANN method.

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KHALIL Zouaoui , SALAH Amroune , Mohamed Said Chebbah, ,(2024-04-23), Analyzing the Impact of 3D Printing Parameters on Tensile Strength through Artificial Neural Network Modeling,3 rd International Workshop on Structural Mechanics and Materials -IWSMM24,university of Batna , Algeria.

This study assesses the impact of alkaline treatments and volume fractions on biocomposites composed of a high-density polyethylene (HDPE) matrix reinforced with date palm tree fibers (FPDS). Tensile tests were conducted on both untreated and NaOH-treated biocomposites. Additionally, fiber analysis was performed using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results reveal higher strength and stiffness compared to HDPE, albeit with limited plasticity making the material brittle. The NaOH treatment enhances certain mechanical properties. Further assessments encompassed hardness, density, melt index, and Izod impact tests. Two volume fractions, 20% and 25%, of FPDS were tested. The study establishes a correlation between empirical predictions and artificial neural network (ANN) models. Notably, an ANN architecture consisting of two input factors, 10 hidden nodes, and one output provides the analysis of mechanical properties. This investigation highlights the potential of FPDS-reinforced HDPE biocomposites, emphasizing their mechanical performance under various treatments and fiber levels.

Citation

SALAH Amroune , , (2024-04-10), Assessment of mechanical and physicochemical properties of palm fiber composites: Effect of alkaline treatment and volume alterations, Journal of Composite Materials, Vol:58, Issue:15, pages:1-28, Weily

Arundo donax L. is investigated in this study as a suitable reinforcing agent for PLA/PP waste blend 3D printing filament. To improve the compatibility of the fibre and polymer, the Arundo fibre was chemically modified using alkali and silane treatment. Untreated and treated fibres were extruded with Polymer blends before being 3D printed. Effect of chemical treatment on thermal, mechanical, and morphological properties of the composites was investigated. The tensile, Izod impact, and water absorption of the 3D printed specimens were also tested. The Alkali treated (ALK) and combination of alkali and silane treatment (SLN) composites displayed good results. Tensile strength and modulus of the materials increased, as well as their maintained stability in the Izod impact test, demonstrating that the incorporation of ArF did not result in a loss in performance. SEM examination supported these findings by confirming the creation of beneficial interfacial contacts between the matrix and fibre components, as demonstrated by the lack of void between the matrix and the fibre surface. Furthermore, the alkali treatment of the ArF resulted in a considerable reduction in water absorption inside the biocomposite, with a 64% reduction seen in ALK composite comparison to the untreated composite (Un). After the 43-day assessment period.

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SALAH Amroune , , (2024-04-10), Effect of chemical treatments of arundo donax L. fibre on mechanical and thermal properties of the PLA/PP blend composite filament for FDM 3D printing, Journal of the Mechanical Behavior of Biomedical Materials, Vol:152, Issue:12, pages:106438, Elsiver

This study explores the relationship between natural fiber filling density (10%, 15%, 25%) and its impact on the bending properties of polymer compounds reinforced with Diss, Sisal and Luffa fibers. Using advanced techniques like fiber analysis and Fourier transform infrared spectrometry (FTIR), the research reveals that a 25% filling density results in the highest stress values (25.61 MPa, 22.21 MPa and 20.88 MPa) for Diss, Sisal and Luffa compounds, respectively, fostering robust bonds in Diss-reinforced polymers. The Artificial Neural Network (ANN) model demonstrates superior predictive capability with correlation coefficients exceeding 0.99 for stress and displacement, outperforming Response Surface Methodology (RSM). Analysis of Variance (ANOVA) underscores the impact of sample section parameters and fiber rate on stress, establishing the significance of type parameters and fiber rate on displacement. This integration of ANN and RSM represents a paradigm shift in predicting bending mechanical properties, advancing our understanding of composite materials for innovative applications.

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SALAH Amroune , , (2024-03-16), Examining the bending test properties of bio-composites strengthened with fibers through a combination of experimental and modeling approaches, Journal of Composite Materials, Vol:58, Issue:12, pages:1-28, Weily

The objective of this study was to assess the tensile strength of epoxy bio-composites reinforced with palm fibers, both untreated and treated with sodium carbonate NaHCO3 at a concentration of 10 % (w/v) for 24 and 96 h, with varying weight percentages of fibers (15 %, 20 %, 25 %, and 30 %). To predict the mechanical performance of the composites, two methods were employed: artificial neural network (ANN) and response surface methodology (RSM). A Box-Behnken RSM design was used to conduct experiments and establish a mathematical model of the bio-composite behavior as a function of the fiber percentage in the samples, specimen cross-section, and treatment time. The ANN forecasts showed consistent expected values for the bio-composite sample behavior, with a correlation coefficient (R2) greater than 0.98 for Young's modulus and 0.97 for stress. Similarly, the correlation coefficients obtained by RSM for the mechanical properties were also highly satisfactory, with an R2 of 0.89 for Young's modulus and 0.87 for stress. Finally, the errors generated by each method (Box-Behnken and ANN) were compared to the experimental results.

Citation

SALAH Amroune , , (2024-02-15), Exploring tensile properties of bio composites reinforced date palm fibers using experimental and Modelling Approaches, Materials Chemistry and Physics, Vol:314, Issue:6, pages:128810, Elsiver

Explore the intriguing world of natural fibers, where Syagrus Romanzoffiana (SR) fibers out as a viable alternative to synthetic and glass fibers in composite materials. Dive into the eco-friendly attraction of SR fibers, which are renowned for their natural degradation and ecologically favorable properties. This novel work investigates the performance characterization of 40 mm gauge-length (GL) SR fibers under quasi-static pressures using rigorous tensile testing. The mystery develops when 200 fibers are examined in seven different test groups, revealing the effect of test quantity (N) on tensile strength, Young’s modulus, and fracture strain. Given the intrinsic diversity of natural fibers, the study applies strong statistical approaches such as least squares (LS) and maximum likelihood (ML) estimations, as well as two- and three-parameter Weibull distributions. Witness the thorough dispersion and probability analysis, which culminates in an enthralling one-factor analysis of variance (ANOVA) across the seven test groups (N = 30, 60, 90, 120, 150, 180 and 200) for each tensile strength characteristic. Join us on this scientific trip as we uncover the mysteries and promise of Syagrus Romanzoffiana fibers to shape the future of composite materials.

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SALAH Amroune , , (2024-01-31), Mechanical properties and statistical analysis of Syagrus Romanzoffiana palm cellulose fibers, Journal of Composite Materials, Vol:58, Issue:6, pages:755-778, Weily

Since the implementation of repair processes by composite patch bonding, this process has consistently demonstrated high performance across various industrial sectors, especially in the fields of aeronautics, aerospace and civil engineering. Consequently, there are situations in which the riveting process becomes the sole solution, particularly when the structure is subjected to severe mechanical or thermo-mechanical stresses, since adhesives have low mechanical strength after aging. Each method has its own set of advantages and disadvantages. The current trend is to combine these two processes to minimise their drawbacks as much as possible. The objective of this work is to present an experimental study on the repair of an aluminium plate AL2024-T3 with a central circular notch using a patch of different nature (metal or composite), under tensile loading conditions. The repair composite considered is a carbon/epoxide. The results of the tensile tests showed that the repair by the combination of the two processes improves the mechanical strength of the damaged structure. A comparison of the results of the experimental curves obtained on riveted, bonded and hybrid assemblies has been taken into consideration.

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SALAH Amroune , , (2024-01-29), Experimental investigation into the tensile strength post-repair on damaged aluminium 2024-T3 plates using hybrid bonding/riveting, acta mechanica et automatica, Vol:18, Issue:3, pages:1-15, SCIENDO

The field of automation in tool path generation for a 3-axis CNC machine is experiencing significant growth in the computer-aided manufacturing sector. Current research efforts are focused on improving the efficiency and precision of this process. To achieve this, new technologies are being explored to enable a more advanced and automated generation of tool paths. In this article, we will examine the current state of research concerning automated tool path generation on a 3-axis CNC machine using Matlab programming tools. As an example, we will consider a complex butterfly shape derived from a mathematical function that allows drawing the 2D geometric form. At the end of the process, a G-code is automatically generated for future use in the CNC machine. The obtained results are highly encouraging, which provides further motivation for continuing research in this direction.

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SAID Zergane , SALAH Amroune , Mohamed SLAMANI , MOUSSA Zaoui , , (2024-01-11), INVESTIGATION FOR THE AUTOMATED GENERATION OF TOOLPATHS ON A 3AXIS CNC MACHINE, Academic Journal of Manufacturing Engineering, Vol:22, Issue:1, pages:9, Academic Journal of Manufacturing Engineering- Editura Politehnica

The environmental effects on the response of Date Palm Fiber (DPF) composites are explored through an in-depth analysis of water absorption behavior. This study comprehensively investigates the influence of fiber content, immersion time, and water type on mass gain. Rigorous experimentation and advanced statistical analyses quantify the percent contribution of each factor, emphasizing the dominant role of fiber content at 96.61%. While immersion time and water type contribute relatively smaller percentages (2.11% and 1.28%, respectively), their insights are invaluable for tailored composite design. The study extends to interaction effects, showcasing the combined influence of factors. Regression models, progressing from linear and reciprocal formulations to comprehensive global models, are developed. Meticulous examination of prediction accuracy, using diverse statistical metrics, highlights the superior performance of the global reciprocal model across different water types. This work provides essential insights for optimizing DPF composite design, fabrication, and application, empowering engineers and researchers to make informed decisions in industries demanding tailored water absorption behavior.

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SALAH Amroune , ADMIN Admin , Mohamed SLAMANI , ADMIN Admin , , (2024-01-09), Water Absorption Behavior of Date Palm Fruit Branches Fiber (DPF) Composites: Experimental and Statistical Analyses, Journal of natural fibers, Vol:21, Issue:1, pages:1-28, Taylor and Francis

In the manufacturing industry, Mastercam X5 is a widely used CNC simulation and programming suite that offers high efficiency. It can be easily integrated with the Mastercam model, providing full associativity and seamless single-window integration. The iMachining technology, which uses patented algorithms for specific operations, is a breakthrough in CNC milling tool path technology. It optimizes the tool path, reduces machining time, and minimizes tool wear. The suite enables a wide range of machining operations on various stock objects, making it flexible and versatile. The simulation process allows real-time observation of operations and ensures error-free G-code for physical operation. This paper details the procedures of machining a spur gear from stock material using Mastercam 2D iMachining technology. The simulation process generates automatic Gcodes for practical use in CNC machines. Mastercam simplifies the concept, operation, and importance of using CAM software in modern-day manufacturing industries. It also enables optimization of operational steps and parameter details to save time, cost, and tool lives, improving overall efficiency.

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Mohamed SLAMANI , SAID Zergane , SALAH Amroune , MOUSSA Zaoui , Chouki FARSI , , (2023-11-24), G-CODE GENERATION FOR MACHININING SPUR GEAR IN CNC MACHINES USING THE IMACHINING STRATEGY, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING, Vol:21, Issue:4, pages:49-57, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING

The accuracy of a machine tool can be significantly impacted by thermal deformation, which is a type of thermal error. Thermally induced positioning errors can occur due to temperature variations that cause the materials in a machine tool to expand or contract, leading to dimensional changes that affect the accuracy of position measurements. Laser interferometer measurements can be used to detect these errors by comparing the actual position of a component to its expected position based on a reference measurement. To control the thermally induced positioning error of machine tools, a mathematical model that describes the relationship between temperature and positioning errors is proposed in this paper. The proposed model is based on empirical data collected from laser interferometer measurements and then used to predict the magnitude of the errors under different thermal conditions. A set of tests was conducted to confirm the thermal model's validity. The excellent match between the experimental data and the calculated values provides evidence supporting the possibility of using the suggested approach for estimating the thermal performance of CNC machine tools.

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Mohamed SLAMANI , SALAH Amroune , , (2023-10-01), ANALYSIS AND MODELING OF THERMALLY INDUCED POSITIONING ERRORS BASED ON LASER INTERFEROMETER MEASUREMENTS, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING, Vol:21, Issue:3, pages:27-33, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING

The aim of this study is to analyze the effect of different geometries and sections on the mechanical properties of epoxy specimens. Five tensile tests were carried out on three types of series. The experimental results obtained were 1812.21 MPa, 3.90% and 41.91 MPa for intact specimens, 1450.41 MPa, 2.16% and 21.28 MPa for specimens with hole and 750.77 MPa, 2.77% and 11.89 MPa for specimens with elliptical -notched for Young's modulus, strain and stress respectively. In addition, the experimental results indicated that the mechanical properties of both (Young's modulus value and stress value) were higher in an intact specimen. Afterwards, the nonlinear functional relationship of input parameters between epoxy sample geometries and sections was established using the response surface model (RSM) and the artificial neural network (ANN) to predict the output parameters of mechanical properties (Young's modulus and stress). In addition, the design of experiment was developed by the Analysis of the Application of Variance (ANOVA). The results showed the superiority of the ANN model over the RSM model, where the correlation coefficient values for the model datasets exceed ANN (R2 = 0.984 for Young's modulus and R2 = 0.981 for the constraint).

Citation

SALAH Amroune , , (2023-09-27), Prediction of mechanical behavior of epoxy polymer using Artificial Neural Networks (ANN) and Response Surface Methodology (RSM), Frattura ed Integrità Strutturale, Vol:17, Issue:66, pages:191-206, Gruppo Italiano Frattura

The aim of this work to explore the absorption behavior of bio composites reinforced with date palm fibers. RSM and ANOVA were utilized to evaluate the impact and interdependence of input variables (Time: from 24 h to 672 h, Fiber content: 15 %, 20 %, and 25 %, and types of water: seawater, distilled water, and rainwater) on the output variables (Mass of CDPF) during a water absorption process that lasted more than 670 h at 23 °C. The findings revealed that the bio composites with the above-mentioned filler content absorbed more water as the amount of fibers increased, with absorption rates of 14.03 %, 19.39 %, 30.94 % for seawater, 15.42 %, 20.64 %, and 36.08 % for distilled water, and 16.37 %, 21.98 %, and 42.10 % for rainwater, respectively. Additionally, the study measured the diffusion coefficient of bio composites, which had a minimum value of about 2.11 × 10−6mm2/s and a maximum value of about 3.99 × 10−6mm2/s. The results of RSM model analysis showed that this model is accurate and reliable. Where the values of R2 and adjusted R2 coefficients for the Mass of CDPF were 99.63 % and 99.61 %, respectively, indicating an ideal match between experimental and predicted values. These findings provide valuable information for engineers interested in incorporating date palm fiber bio composites during development and implementation.

Citation

SALAH Amroune , , (2023-08-22), Modelling and optimization of the absorption rate of date palm fiber reinforced composite using response surface methodology, Alexandria Engineering Journal, Vol:75, Issue:77, pages:545-555, elsevier

The utilization of cellulosic fibers is becoming increasingly widespread worldwide as promising raw material in polymer composite reinforcement. However, and despite the multiple advantages of cellulosic fibers like the lower density, cheap cost and biodegradability, their use is limited due to hydrophilic character which reduces their affinity with hydrophobic matrices. A natural fiber treatment, whether chemical or physical, is advised to address this issue. The purpose of this study is to characterize the Ampelodesmos mauritanicus plant (AM) fibers extracted by the chemical method (2% NaOH for 48 h) and treated (chemically and physically). We carried out acetylation, mercerization and microwaves modification of the AM plant fibers to reduce their hydrophilic character. The influence of chemical and physical treatments on the structure and morphology of AM plant fibers was characterized by analytical techniques as per International Standard. X-ray diffraction confirmed that the AM fibers have a good crystallinity index (52.4%). Microwave physical treatment at 550 W increased their density from 1.00 to 1.55 g/cm3, their Young’s modulus and tensile strength from 11.0 to 18.6 GPa and from 155 to 290 MPa, respectively, giving the highest values. It is followed by chemical treatments: first with acetic anhydride (C4H6O3) for 4 h and then with 3% NaOH also for 4 h. It should be observed that the data have a very considerable dispersion that calls for statistical analysis (method of Weibull with two and three parameters was utilized).

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SALAH Amroune , , (2023-08-08), The impact of physicochemical treatments on the characteristics of Ampelodesmos mauritanicus plant fibers, Cellulose, Vol:30, Issue:12, pages:7479-7495, Springer Netherlands

The main objective of this work is the numerical prediction of the mechanical behaviour up to the damage of the bends of the functionally graded material (FGM) type ceramic/metal pipes. Firstly, the effective elastoplastic proper-ties of bent FGM pipes were determined using the homogenisation law by the Mori–Tanaka models for the elastic part and TTO (Tamura-Tomota-Ozawa) for the plastic part based on a rule of mixtures per function in the form of a power law. Our work also aims at the use of a meshing method (UMM) to predict the behaviour of the FGM by finite element in the mesh of the model. The analysis was performed using the UMM technique for different loading cases and volume fraction distribution. Two stages are necessary for the analysis of the damage: the first is the model of initiation of the damage established by the criterion of maximum deformation named MAXPE and the second is criterion of the energy of the rupture according to the theory Hillerborg used to determine damage evolution. Both stages involve a 3D finite element method analysis. However, for damage, the XFEM technique was used in our UMM method to predict crack initiation and propagation in FGM pipe bends. The results of the numerical analysis concerning the mechanical behavior showed, that if the nature of the bent pipes is in FGM, a good reduction of the various stresses compared to those where the nature of the pipe is metallic material. The results were presented in the form of a force–displacement curve. The validation of the proposed numerical methodology is highlighted by comparisons of current results with results from the literature, which showed good agreement. The analysis took into account the effect of the main parameters in a bent FGM pipe under internal pressure and bending moment on the variation of the force–strain curves.

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SALAH Amroune , , (2023-05-24), NUMERICAL STUDY OF THE MECHANICAL BEHAVIOUR AND DAMAGE OF FGM BENT PIPES UNDER INTERNAL PRESSURE AND COMBINED BENDING MOMENT, acta mechanica et automatica, Vol:17, Issue:3, pages:460-468, Bialystok University of Technology

The This work studies the drilling performance of bio composites reinforced with cellulosic fibres. The drilling was carried out at three spindle speeds and at three feed rates using three dissimilar drills namely: HSS-TITAN, HSS-CARBIDE, and HSS-SUPER. The drilling performance was evaluated in terms of the delamination factor which was determined using the free software image J. The results showed that the value of this factor decreased with increasing spindle speed and increased with increasing feed rate. On the other hand, the HSSSUPER drill causes less delamination than the other two drills. To predict the delamination value, the artificial neural network (ANN) method was used. The best hole quality was obtained when using the HSS-SUPER drill, with a spindle speed of 2200 rpm and a feed rate of 40 mm/rev. The worst case was brought when using an HSS-carbide drill, with a spindle speed of 500 rpm and a feed rate of 120 mm/ rev

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Mohamed SLAMANI , SALAH Amroune , Riyadh benyettou , Ali KILIÇ, , (2023-01-15), INVESTIGATION OF MACHINABILITY OF BIOCOMPOSITES: MODELING AND ANN OPTIMIZATION, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING, Vol:21, Issue:1, pages:97-104, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING

The presence of geometric discontinuity in a material reduces considerably its resistance to mechanical stresses, therefore reducing the service life of materials. The analysis of structural behaviour in the presence of geometric discontinuities is important to ensure the proper use, especially if it is regarding a material of weak mechanical properties such as a polymer. The objective of the present work is to analyse the effect of the notch presence of variable geometric shapes on the tensile strength of epoxy-type polymer specimens. A series of tensile tests were carried out on standardised specimens, taking into account the presence or absence of a notch. Each series of tests contains five specimens. Two notch shapes were considered: circular (hole) and elliptical. The experimental results in terms of stress–strain clearly show that the presence of notches reduces considerably the resistance of the material, where the maximum stress for the undamaged specimen was 41.22 MPa and the lowest stress for the elliptical-notched specimen was 11.21 MPa. A numerical analysis by the extended finite element method (XFEM) was undertaken on the same geometric models; in addition, the results in stress–strain form were validated with the experimental results. A remarkable improvement was obtained (generally an error within 0.06%) for strain, maximum stress, Young’s modulus and elongation values. An exponential decrease was noted in the stress, strain, and Young’s modulus in the presence of a notch in the material.

Citation

SALAH Amroune , , (2023-01-02), Experimental and numerical study of the effect of the presence of a geometric discontinuity of variable shape on the tensile strength of an epoxy polymer, acta mechanica et automatica, Vol:17, Issue:2, pages:192-199, Bialystok University of Technology

The present article attempts to study absorption properties of bio-composites reinforced with date palm fibers. The effect of fiber loading on water absorption at room temperature 25°C was investigated. The weight gain was measured of bio-composites immersed in distilled water, seawater and rainwater, for more than 670 hours, until reaching the saturation with a measurement interval between 24 and 48 hours. To understand absorption phenomenon, scanning electron microscopy was used. Porosity rate was determined using image J software. It was noted the water absorption rate of the bio composites reached 16.20%, 16.33%, 21.94%, 41.99% for seawater, 16.41%, 16.52%, 20.84%, 30.08% for distilled water, and 14.00%, 14.04%, 19.30%, 36.94% for rainwater, respectively. The absorption increases when increasing fiber content. The diffusion coefficient of bio-composites has minimum and maximum values of about 1.94 × 10−6mm2/s and 3.99 × 10−6mm2/s, respectively. Palm fibers are highly porous. The porosity value was higher than 51%. To predict the absorption rate, artificial neural network method was used. The ANN models obtained are very well correlated with the experimental data where the values of the correlation coefficient of the datasets are all beyond 0.99 and the average error value was estimated at 3 × 10−5.

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Mohamed SLAMANI , Riyadh benyettou , SALAH Amroune , Yasemin Seki, Alain Dufresne, , (2022-10-25), Experimental Investigation of the Absorption Behavior of Date Palm Fiber Reinforced Iso-Polyester Composites: Artificial Neuron Network (ANN) Modeling, Journal of Natural Fibers, Vol:19, Issue:17, pages:15902-15918, Taylor & Francis

This work focuses on the study of the drilling performance of bio composites reinforced with date palm fibers (CDPF). It is a new fiber that is characterized in terms of piercing behavior for the first time. The experimental study was carried out with three types of drills, with a diameter of 10 mm and feed and spindle speeds of the order of (40, 80 and 200 mm/min) and (560, 1120 and 2240 rpm), respectively. The drilling performance was assessed in terms of delamination and surface quality, such as circularity and cylindricity of the drilled holes. Using the CMM machine, the value of the delamination factor was determined using Image J software. The results showed that the value of the latter increased with the increase in feed rate and decreased with the increase in spindle speed. The delamination factor has maximum and minimum values of approximately 1.98 and 1.01 respectively. For the first time, RSM and ANOVA were used to assess the influence and interaction of input parameters (cutting conditions) on the output parameters (delamination factor Fd) during drilling of CDPF. The results obtained help manufacturers, to choose the most appropriate machining conditions to achieve better machinability for other newly developed NFRCs in the aeronautical and defense industry where the substitution of the synthetic fibers by the natural fibers becomes inevitable for economic reasons.

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SALAH Amroune , Mohamed SLAMANI , Riyadh Benyettou, , (2022), Assessment of induced delamination drilling of natural fiber reinforced composites: a statistical analysis, Journal of Materials Research and Technology, Vol:21, Issue:, pages:131-152, Elsevier

Abstract: By increasing their electricity production capacity, this work focuses on a new wind farm configuration study currently in service. More specifically, a study that aims to enlarge the production area of the ventilated sites by implanting more wind turbines in optimal positions behind the existing turbines. In order to achieve this goal, we use Jensen's linear wake pattern to describe the behavior of wind speed in wake, as well as a method based on the generation of a sequence of modified pseudo-random numbers as Mathematical approach to optimize the location of the wind turines. To perform numerical simulations, a program under MATLAB has been developed using the characteristics of the Gamessa G52 turbine and the data of the site in the production of Kaberten in Algeria. The results obtained from this study are presented and discussed.

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SAID Zergane , SALAH Amroune , MANSOUR Rokbi , seyf-eddine.guesmia@mail.concordia.ca, , (2022), New study on the extension of a current wind farm; case of Kaberten park in Algeria, Turkish Journal of Computer and Mathematics Education, Vol:13, Issue:2, pages:428-434, Turkish Journal of Computer and Mathematics Education

An essential challenge for the future of composite materials is to make their manufacture and use compatible with increasingly demanding environmental expectations. In this context, the replacement of mineral or synthetic fibers by plant fibers is of great interest. However, the latter must comply with the same specifications, particularly in terms of mechanical properties. Thanks to their low density, their biodegradability as well as their abundance, the use of these fibers is interesting from Thanks to their low density, their biodegradability as well as their abundance, the use of these fibers is interesting from thanks to their low density, their biodegradability as well as their abundance, the use of these fibers is interesting from economic and environmental point of view. The dimensions of the fiber, such as diameter, are essential elements when calculating the mechanical parameters of the plant fiber. Among the techniques used to measure the diameter, one can use the optical microscope, the software ImageJ and the density. Theoretically, similar failure parameters should be obtained when different techniques are used. However, the experimental data show various parameters according to different used techniques. In this work, we carried out several experiments on natural fibers in order to determine the fracture parameters in static traction by calculating the diameter of the fiber by two ways: density method and optical method. The results reveal that the failure parameters are dependent on the diameter, hence the suitable technique plays a crucial role.

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SAID Zergane , MANSOUR Rokbi , SALAH Amroune , abderaouf.khaldoune@univ-msila.dz, Ben Adda A, Nouari N, , (2022), Determination of the rupture parameters of a plant fiber by using two diameter measurement techniques, Materials Today: Proceedings, Vol:53, Issue:1, pages:237-243, Elsevier

In this study, the characterization of the tensile mechanical properties of over a population of 120 samples treated and untreated palm dates long technical fibers using Weibull statistics with two and three-parameters, together with a one-way analysis of variance (ANOVA). The fibres extracted from Palm Date have been subjected to alkaline treatment with different NaOH concentrations 0.5% and 1% for 12, 24 and 48 hours respectively at room temperature. Statistical processing of the results using response surface method (RSM) and artificial neural networks (ANN) to find optimal result of FPD. The results shown ANN and RSM models offer the potential to have a lot of useful information with the least amount of test mixtures and have also proved to be effective in predicting strain , stress and Young’s modulus.

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Riyadh benyettou , SALAH Amroune , Hocine Heraiz, kangmin Niu, khalissa.saada@univ-msila.dz, ,(2022), Surface method (RSM) and artificial neural networks (ANN) for modeling tensile mechanical of natural fibers,1st International Conference on Innovative Academic Studies on 10-13 September in 2022 at Konya/Turkey,Turkey

This study presents a method to determine the thermo-mechanical properties of bio-composite parts reinforced with natural fibers. Three orientations according to well-defined angles (15°, 30° and 45°) are used with an Abaqus computer code and the Python programming language. The influence of different fiber orientations in representative volume elements has been demonstrated when analyzing heat transfer in fiber-reinforced polymer composites. Finite element method (FEM) simulations were performed to model and visualized 2D and 3D microstructures of natural fiber reinforced matrix composites with heat transfer and mechanical property boundary conditions. The results indicate that the microstructural heterogeneity influences the rates of thermo-mechanical properties and therefore overall, the conduction of the composite is affected by the orientation of the fibers in the matrix

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Riyadh benyettou , SALAH Amroune , Hocine Heraiz, kangmin Niu, khalissa.saada@univ-msila.dz, ,(2022), The effect of fiber orientation on the thermo mechanical properties of bio composites,2nd International Conference on Engineering and Applied Natural Sciences on 15-18 October in 2022 at Konya/Turkey,Turkey

This work focuses on studying the drilling performance of bio-composites with a palm fiber reinforcement fraction of 40 wt%. The drilling was carried out under dry cutting conditions at three spindle speeds of 500,1100 and 2200rpm and three feed rates of 40, 80, and 120 mm/rev using three 10 mm diameter drills: T1: HSS-TITAN, T2: HSS-CARBIDE, and T3: HSS-SUPER. The drilling performance was evaluated in terms of the circularity and cylindricity of holes that were determined using a CMM device applying the technique of contact scanning. The results showed that the effect of feed rate was greater than spindle speed. It is found that an increase in the feed rate value results in a degradation of circularity and cylindricity: For holes drilled under the following cutting conditions (N=500rpm, ƒ=40mm/rev, and T=T1). The circularity and cylindrical values was 0.0301 and 0.0475 respectively. On the other hand these values rise to 0.0740 and 0.1717, respectively, when drilling under cutting conditions (N = 500 rpm, ƒ = 120 mm/rev and T = T1). It was observed that holes drilled using coated tools (T1 and T2) produced fewer errors than the uncoated tool (T3). The circularity and cylindricity have minimum and maximum values of approximately 0.0180, 0.0852 for circularity, and 0.0475, 0.554 for cylindricity.

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Riyadh benyettou , SALAH Amroune , Mohamed SLAMANI , Hocine Heraiz, khalissa.saada@univ-msila.dz, ,(2022), Analysis of the effect of cutting conditions for circularity and cylindricity errors for drilling bio composites,2nd International Conference on Engineering and Applied Natural Sciences on 15-18 October in 2022 at Konya/Turkey,Turkey

In this article we present an experimental and numerical study of the behavior of the boundary layer type viscous flow in the presence of the thermal effect. The flow was held in a three-dimensional field with a uniform infinite velocity in the case of an adiabatic wall with heat input. The presented experimental work was performed in the Thermal Laboratory (LET) of the Prime Institute of Poitiers (France). It describes the analysis of a turbulent boundary layer created in a wind tunnel on the surface of a flat plate covered with epoxy resin. An HP 6012A power supply system was used to provide circulating heat flux to heat the flat plate to 80°C by the Joule effect. The numerical result shows a clear difference in the evolution of the thermal boundary layer between the three temperatures of the wall.

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Amar BERKACHE , ADMIN Admin , SALAH Amroune , ADMIN Admin , ADMIN Admin , Ali Golbaf, Barhm Mohamad, , (2022), EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF A TURBULENT BOUNDARY LAYER UNDER VARIABLE TEMPERATURE GRADIENTS, Journal of the Serbian Society for Computational Mechanics, Vol:16, Issue:1, pages:15, https://www.slideshare.net/BarhmMohamad/experimental-and-numerical-investigations-of-a-turbulent-boundary-layer-under-variable-temperature-gradients

In this paper, a detailed numerical analysis of the effect of dynamic stall on the aerodynamic performance of a Darrieus H three-bladed vertical axis wind turbine is performed. To do this a series of simulations based on the Reynolds averaged Navier–Stokes (RANS).with turbulence modeling by the k-ω SST model is used. In order to quantify the influence of the dynamic stall on the aerodynamic performance of the rotor, the characteristics of the flow field around the rotor in different configurations are studied. For different velocity ratio values, dynamic magnitudes such as torque and rotor power are presented and analyzed. Also, two parameters are carefully studied: the mesh resolution and the size of the time step. In the analysis, it seems that these parameters affect the accuracy of the results. The numerical results show that dynamic stalling directly affects energy production. The results obtained show that the blades performance decreases when the profile is stalled, it is therefore important to design wind turbines that operate within the limit of dynamic stall. Finally, the numerical results of the power coefficient of the rotor are compared with the experimental data from the bibliography. An error of 8% is observed in this comparison.

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Amar BERKACHE , SALAH Amroune , Abdelouhed AYACHI AMAR, Belkheir NOURA, Abdellah BOUMEHANI, , (2022), NUMERICAL MODELING OF DYNAMIC STALL IN A VERTICAL AXIS WIND TURBINE, ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING, Vol:20, Issue:4, pages:9, https://ajme.ro/PDF_AJME_2022_4/L14.pdf

Date palm fibers have been studied as potential reinforcement in composite materials. Their density is equal to 1.22 g.cm−3; making them suitable for use in lightweight applications. In order to efficiently use these fibers and understand their mechanical properties, quasi-static tensile tests and cyclic fiber fatigue tests were performed to determine the mechanical properties. Their internal structure, elementary fibers and porosity were analyzed by scanning electron microscopy. The results show that the mechanical properties are clearly improved by taking into account the porosity by calculating the real section of the fibers by using the imageJ software a cross-sectional pore fraction of the fibers has been determined and the ultimate properties of the pore-free bulky fibers has been calculated with stress and Young’s modulus increased by approx. 54% as compared to the highly porous natural fibers.

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SALAH Amroune , , (2022), Investigation on Microstructure, Tensile Properties and Fatigue Characterization of Porous Date Palm Fiber, Journal of natural fibers, Vol:19, Issue:17, pages:15751-15764, Taylor & Francis

The objective of the present study is to develop an environment friendly alternative material based on available and local bio-source from the wastes of Algerian date palm trees, date palm twigs fiber (DPF) was selected as an effective reinforcing material for high density polyethylene (HDPE) biocomposite. Two types of treatments have been used including sodium hydroxide (NaOH) treatment to obtain DPF1 followed by potassium permanganate (KMnO4) treatment to obtain DPF2 for aim to improve fiber-matrix compatibility, HDPE biocomposite reinforced with different ratios of DPF1 and DPF2 varying from 10 to 30 wt% were elaborated, characterized, and compared to select the preferred treatment and percent of DPF which can be used with high properties. The results obtained indicates that the incorporating of 30 wt% of DPF2 in HDPE biocomposite led to an improve in the mechanical and morphological properties. In fact, the improvement in interfacial properties improve ultimate biocomposite performance, and thus qualified its use in different industrial application. The maleic anhydride grafted high-density polyethylene (HDPE-g-MA) was incorporated as a coupling agent to the reinforced biocomposite of 30 wt% DPF2/HDPE with two different loading (7 and 10 wt%), Also, the treatments were seen to enhance the tensile strength and elastic modulus. Additionally, the biocomposites observation by scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed more intimate contact between the fibers and HDEP matrix after surface modification. The results suggested that the successful sample with best characteristics which can be advised is 30 wt% DPF2/HDPE/10 wt% HDPE-g-MA, that offer their use in many applications particularly in the automotive industry.

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SALAH Amroune , , (2022), Effect of alkali surface treatment and compatibilizer agent on tensile and morphological properties of date palm fibers-based high density polyethylene biocomposites, Polymer composites, Vol:43, Issue:10, pages:7211-7221, Weily

In this paper, 400 flax fibers with 10 different lengths (40 fibers at each length) are experimentally characterized (quasi-static tensile behavior) and then the results are statistically analyzed. The quasi-static tensile test results appeared to have a large dispersion, which makes it possible to measure the degree of variability in the ultimate tensile strength (UTS), failure strain, and the Young’s modulus of the fiber, at different gage lengths (10 mm to 500 mm). The variation in mechanical properties at each fiber length is established using two and three Weibull statistics based on maximum likelihood estimation (ML) and least square estimation (LS). Finally, all 10 groups for each tensile property are analyzed by one-way (ANOVA).

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SALAH Amroune , , (2022), Statistical and Experimental Analysis of the Mechanical Properties of Flax Fibers, Journal of natural fibers, Vol:19, Issue:14, pages:1387-1401, Taylor & Francis

The need to preserve nature has led researchers to explore new natural fibers for biodegradable biocomposites. Present work explored first time the thermo-physico-chemical, morphological, and mechanical properties of Yucca treculeana (YT) fiber with a density of 1.330 ± 0.039 g/cm3. The estimated chemical analysis of YT fiber is 82.3%, 12.1%, and 5.6% for cellulose, hemicellulose, and lignin, respectively. The surface chemistry, crystallinity, and functional groups of YT fibers were analyzed by XPS, XRD, and FTIR, respectively. The concentration levels of carbon (62.88%) and oxygen (33.72%) were detected by XPS. XRD analysis showed that the YT fiber has a crystallite size of 3.02 nm and a crystallinity index of 48.85%. Based on the thermal analysis by TGA, the results show thermal stability of the YT fiber up to 360.6°C. The average mechanical properties of the fiber are 222 MPa for the tensile strength, 2.47% for the strain at break and the Young’s modulus is equal to 16.85 GPa. In addition, the results obtained in this study were compared with those found in the related literature. All these results prove that YT fiber can be used as reinforcement in making lightweight industrial biocomposites with thermoplastic or thermosetting polymers.

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SALAH Amroune , , (2022), Extraction and Characterization of a New Lignocellulosic Fiber from Yucca Treculeana L. Leaf as Potential Reinforcement for Industrial Biocomposites, Journal of natural fibers, Vol:19, Issue:15, pages:12235-12250, Taylor & Francis

The present investigation aimed to understand the physicochemical properties of the new cellulosic fiber extracted from the bark of Silybum marianum (SM), in view of using it as a potential reinforcement for polymer composites. The morphological and anatomy, physical, thermal and mechanical properties of fibers were firstly discussed in this paper. The Silybum marianum fibers (SMF) were characterized by scanning electron microscopy, Fourier transform infrared, thermogravimetric analysis (TGA), optical microscope, X-ray diffraction (XRD), and single fiber tensile test. The average Young’s modulus and the breaking stress data presented by the fibers are 15.97 GPa and 201.16 MPa, respectively. XRD reveals the presence of cellulose with a crystallinity index of 45%. Thermal stability (250°C) and maximum degradation temperature (357.72°C) of the SMF are established by the thermogravimetric analysis. An analysis of the mechanical properties was carried out on a population of 35 samples using Weibull statistics with two and three parameters.

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SALAH Amroune , , (2022), Investigation of mechanical, physicochemical, and thermal properties of new fiber from Silybum marianum bark fiber, Journal of Composite Materials, Vol:56, Issue:14, pages:3451-3462, Weily

Le traitement chimique des fibres végétales a un rôle positif dans l'augmentation du processus d'adhésion entre les fibres ,Il est utilisé pour renforcer thermiquement la matrice polymère, qui est un polyester insaturé pour améliorer l'efficacité et les propriétés mécaniques des matériaux composites à travers cette étude, l'effet de traitement chimique utilisant la photo sur la fibre végétale représentée par cynodon dactylon. Dans un deuxième temps, nous avons utilisé un appareil infrarouge des tests chimiques sur divers échantillons de fibres de cynodone dactylon ont prouvé que les traitements chimiques réduisent la les groupes hydroxyles qui filtrent sur les fibres sont de nature hydrophile, ce qui indique que le traitement alcalin réduit la propriété hydrophile des fibres de cynodon dactylon, augmentant le processus de cynodon dactylon la matrice, lors de la formation de composés en raison de la rugosité de surface des fibres et de la solubilité des pectines, des lignines et des cires les résultats en infrarouge ont montré que la structure de la fibre cynodon dactylon a changé après le processus de traitement. Cette modification a été montrée par la disparition de pic à 1647,09 cm-1 après après le traitement alcalin . L'analyse aux rayons X a montré une amélioration de l'indice et de la taille des cristaux cristaux de fibre de cynodon dactylon après traitement. Aussi une augmentation du taux. La cristallisation des composés C94 s'élevait à 30 366% par rapport à C00 qui s'élevait à29 629%.

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SALAH Amroune , MOUSSA Zaoui , Saada.Khalissa@univ-msila.dz, ,(2022), The effect of the meshing technique on cracking and its extension in a bio composite plate,ICEANS 2022,Konya/Turkey.

This study concerns the wear behaviour of metal couples used in industry, particularly in mechanical sliding systems (numerically controlled machine tools). In general, the nature of the materials of the parts of these systems which are in contact and move relatively, are medium carbon steels, thanks to their good mechanical and tribological properties. The present work aims to study, the dry sliding wear of the contact surface of the pin (machine slide) against the contact surface of a disc (machine groove) and the damage induced on the worn track. The pin is AISI 1038 and AISI 1045 steel, the disc is AISI 1055 steel. The tribological tests were carried out on a pin-disc tribometer, in an atmospheric environment. The wear of the pins being evaluated by weighing and studied according to the hardness of the pin with the variation of the normal load applied. The discussion of the results is based on SEM observations and EDS analyzes of worn surfaces and interfacial phenomena produced by dynamic contact. The results obtained indicated the influence of the applied load and the hardness on the wear of the pin and therefore on the tribological behaviour of the worn surfaces.

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SALAH Amroune , , (2021), Experimental investigations of surface wear by dry sliding and induced damage of medium carbon steel, DIAGNOSTYKA, Vol:22, Issue:2, pages:3-10, DIAGNOSTYKA

Abstract: This work is a contribution to the study of the rigidity of rotational friction welding of cylindrical specimens made on a parallel lathe. We performed welding of three combinations of parts: steel / steel, aluminium / aluminium and steel / aluminium according to three numbers of rotations of the spindle (900, 1250 and 1800 rpm). To control the rigidity and quality of these assemblies, tensile tests are used followed by ultrasonic testing to ensure that the tips are welded and that there are no internal defects. Hardness profile of the welded zone according to the welding parameters was obtained. Metallographic observations have detected the profile of the various zones welded and affected thermally. The results of the mechanical tests showed that a rotation speed of 1250 rpm can produce a very good weld, with other parameters kept constant.

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SALAH Amroune , , (2021), Characterization and mechanical behaviour of similar and dissimilar parts joined by rotary friction welding, Engineering Solid Mechanics, Vol:9, Issue:1, pages:23-30, Engineering Solid Mechanics

This work describes the quasi-static tensile behavior and cyclic fatigue of technical fibers from date palm tested for the first time according to the authors' knowledge, which can be used in the reinforcement of green composites.The values of the stress and strain at failure and Young's modulus for18 samples tested under quasi-static tensile loading are compared with results reported in the literature for other fibers. Cyclic fatigue tests were performed at a frequency of 2 Hz under sinusoidal solicitation for different loading levels ranging from 0.6 to 0.95 corresponding to maximum recorded forces of 15.36 and 39.82 N, respectively. The evolution of the force as a function of the number of cycles was recorded. This allows us to follow the stiffness degradation. The load-displacement hysteresis curves show the influence of the number of cycles and the loading level on the size and shape of the hysteresis loops, allowing the calculation of the dissipated energy per cycle for the technical fibers.

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SALAH Amroune , Bezazi Abderrezak, , (2020), Investigation of the date palm fiber for green composites reinforcement: Quasi-static and fatigue characterization of the fiber, Industrial Crops and Products, Vol:146, Issue:2020, pages:112135, Elsevier

The effect of a pre (before) and post (after) heating welding treatment on the microstructure and mechanical properties of the scrap blades made of cast INC738LC superalloy is the main goal of the present investigation. The filler used in TIG welding was a INC 625 solution hardened superalloy as the proposed solution for hot cracking of the INC738LC cast superalloy in literature. The TIG welding was processed with respect to the constantly optimized parameters (current, voltage, speed, gas flux rate and number of passes) to make a mechanical properties comparison between the as received superalloy and the welded superalloy with heat treated specimens. The characterization techniques employed in this study are hardness measurements, tensile tests, optical microscopy and scanning electron microscopy. We found that the proposed preheating improves the TIG welding of the INC 738 LC superalloy specimens and the post welding heat treatment enhances its mechanical properties.

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noureddine MENASRI , Cherif saib , MOUSSA Zaoui , SALAH Amroune , H. Gauss, , (2020), EFFECT OF PRE-POST TIG WELDING HEAT TREATMENT ON CAST NI SUPERALLOY, ANNALS OF DUNAREA DE JOS UNIVERSITY OF GALATI, FASCICLE XII, WELDING EQUIPMENT AND TECHNOLOGY, Vol:31, Issue:, pages:35-42, Galati University Press

In this study, biocomposites fibers (flax/epoxy) with different fiber ratios were manufactured and their tensile, 3-point bending and morphological properties were characterized. The interfacial binding of fractured composite samples after tensile and 3-point bending tests were examined by scanning electron microscopy (SEM). The mechanical results revealed an increase in the composite sample manufactured by second formulation CT090 (biocomposites UD [0/90°]s treated by NaHCO3) compared to the different formulations studied. For example, the stress and Young’s modulus values of qua-static traction of the biocomposite CT090 treated with sodium bicarbonate are obtained to be 70.13 MPa and 1420.47 MPa, respectively. The overall test results stated that bio sodium carbonate treatment enhanced the mechanical and morphological properties of the biocomposites in this study. Finally, the experimental results were subjected to a one-way analysis of variance (ANOVA) using MINITAB software.

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SALAH Amroune , , (2020), Quantitatively Investigating the Effects of Fiber Parameters on Tensile and Flexural Response of Flax/Epoxy Biocomposites, Journal of natural fibers, Vol:19, Issue:6, pages:2366-2381, Taylor & Francis

In this comprehensive investigation, we evaluate the mechanical properties and the effect of drilling parameters (spindle speed, 355, 710 and 1400 rev/min; feed rate, 50, 108 and 190 mm/min; and the tool diameter, 5, 7 and 10 mm) as a function of the cutting process on the delamination factor when drilling jute fabrics reinforced epoxy matrix biocomposites. The study is carried out using different drill geometries and material (HSS_TiN, HSS and brad and spur drill bits). The design of experiment is developed by the application analysis of variance (ANOVA). The response surface methodology (RSM) and artificial neural networks (ANN) are applied to validate the results obtained during the experiment and to predict the behaviour of the structure under any cutting condition. Result analysis showed the superiority of the ANN model over the RSM model, while the feed rate had a significant contribution on spindle speed and diameter. The optimum conditions obtained for the Fd factor were a feed rate of 51 mm/min, a spindle speed of 1160 rev/min and a drilling diameter of 5 mm

Citation

SALAH Amroune , , (2020), Mechanical characterization and optimization of delamination factor in drilling bidirectional jute fibre-reinforced polymer biocomposites, International Journal of Advanced Manufacturing Technology, Vol:111, Issue:2020, pages:2073–2094, Springer

In this study, biocomposites of HDPE/flax fibers in different formulations were developed and their tensile, 3-point bending, and morphological properties were extensively characterized. The interfacial bond in the fractured biocomposite samples was examined by scanning electron microscopy (SEM). While the thermal behavior of these novel HDPE/flax biocomposites was studied using DSC and ATG. The ratio of tested reinforcement by weight varies from 5% to 20% of natural flax fiber with different heating rates, namely 5°C/min, 10°C/min, and 20°C/min. The results for the mechanical properties obtained such as the tensile and flexural strength revealed an increase of 24 to 35 MPa and 15.82 to 19.72 MPa, respectively, compared to neat HDPE. On the other hand, the thermal tests revealed that the heating rate has a pronounced effect on the thermal behavior of the materials studied by shifting the degradation range of biocomposites to high temperatures.

Citation

SALAH Amroune , , (2020), Elaboration and Characterization of Flax Fiber Reinforced High Density Polyethylene Biocomposite: Effect of the Heating Rate on Thermo-mechanical Properties, Journal of natural fibers, Vol:19, Issue:10, pages:3928-3941, Taylor & Francis

Abstract: In order to study the behaviour of a notch specimen under plane mixed mode I +II, a Brazilian disc specimen weakened by U-notch located at the edge of disc is considered. A high-strength steel material was used for the disc specimen subjected to diametral compressive loading. A local approach represented by strain energy density approach based on determination of mean value of the strain energy density (that is over a given finite-size volume surrounding the highly stressed regions near the notch tip) was utilized. A finite element analysis by cast3m code have been undertaken in order to determine the evolution of the stress intensity factors and averaged strain energy density for different location of notch from the axis of force application. Variations of radius and angle of notch will cause disturbance in the stress field and local energy in the vicinity of the notch tip. The results of finite element computations were expressed as mathematical relations showing the influence of notch position and its radius on stress intensity factors and averaged strain energy density. The reduction of the angle increases the local energy unlike the increase of the radius tends to reduce it.

Citation

SALAH Amroune , , (2020), Brittle fracture investigation from disc specimen weakened by U- notch in mixed mode I + II, Engineering Solid Mechanics, Vol:8, Issue:4, pages:337-352, Engineering Solid Mechanics

The balancing operation consists in improving the distribution of the rotor masses so that the free centrifugal forces around the rotor axis, imposed by the manufacturer, do not exceed the tolerances allowed by the standards. In this paper we propose algorithms for the distribution of the turbine blades from data from an electronic scale which allows to measure the static moment of the blades, these algorithms aim to find the correction weight and the angle of position of the correction mass, we also propose a simulation of the distribution of the blades of a turbine to get an idea on the assembly. This operation is necessary in the case of a repair of the rotors or in the assembly of the new flexible rotors. Using a MATLAB calculation code.

Citation

SALAH Amroune , , (2019), New approach for computer-aided static balancing of turbines rotors, diagnostyka, Vol:20, Issue:4, pages:95-101, DIAGNOSTYKA

In this work, a surface treatment with sodium bicarbonate (NaHCO3) at different concentrations of 4 and 8% is applied to the surface of the flax fiber for a period of 80 hours at room temperature. The purpose of this study is to observe the effect of different treatment processes on the flax fiber, i.e. on its mechanical properties such as: stress and strain at break and Young's modulus. A major test campaign of more than 240 tests is carried out. Due to the variability of the plant fibers, more than 80 samples were tested for each group at a gauge length (GL = 10 mm). The results of the quasi-static tensile tests have a large dispersion which makes it possible to measure the degree of variability in the stress and strain deformation and the Young's modulus of the fiber. This degree of variability has been studied by means and statistical tools such as the Weibull distribution at two.

Citation

SALAH Amroune , Azzedine Bedjaoui, Ahmed Belaadi, Belgacem Madi, , (2019), Impact of surface treatment of flax fibers on tensile mechanical properties accompanied by a statistical study, INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING, Vol:11, Issue:6, pages:010-017, UTHM

The high-gradient magnetic separation process is a technique used in heavy industries, particularly steel mills, to extract magnetic particles from mixtures. The difficulty of separating the slightly magnetic particles from the nonmagnetic ones lies in the distribution of the magnetic field and the fineness of their class to be separated. A use of different separation matrix profile is implemented, making it possible to act on the value of the gradient of the inhomogeneous magnetic field. Different matrixes are tested and the results obtained experimentally allows to choose the most efficient matrix form in the operation of extraction which increased by 11% in magnetic fraction yield, 15% iron content and 17% of extraction degree relative to the John’s matrix. This matrix used is consistent with that cited in literatures. The separation technology used can extend its useful application to small particles from very weakly magnetic materials. Its exploitation will result in the method of reducing the degree of pollution and improvement the process of extraction of minerals that has an impact on the environment and on human health as a result a high level of extraction.

Citation

Chouki FARSI , SALAH Amroune , , (2019), High gradient magnetic separation method for weakly magnetic particles: An Industrial Application of iron metals, Metallofizika i Noveishie Tekhnologii, Vol:41, Issue:8, pages:1103—1119, G.V. Kurdyumov Institute for Metal Physics

This study focuses on the chemical and thermo-physical characterization of date palm fiber, which can be used in the reinforcement of green composites. Alkaline solutions with different concentrations of NaOH (0.5, 1, 2 and 3%) and various immersion times (0.5, 1, 2, 4, 6 and 8h) at room temperature were used to treat fibers obtained from date palm fruit branches. In total, 750 samples were tested, and the results obtained show that the chemical treatment of the fibers can lead to an increase, up to 3 times, of their mechanical properties (strength and Young’s modulus) in quasi-static tensile tests. Due to the dispersion in the experimental data, a statistical approach is required to evaluate the mechanical properties. To better understand the phenomena related to the physico-chemical properties of these fibers, several characterization techniques have been used, namely Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and X-ray diffraction. The data have been compared with results reported in the literature for other lignocellulosic fibers.

Citation

SALAH Amroune , , (2019), Investigation of the Date Palm Fiber for Green Composites Reinforcement: Thermo-physical and Mechanical Properties of the Fiber, Journal of Natural Fibers, Vol:17, Issue:4, pages:1-18, Taylor and Francis

One of the most valuable criteria for vehicle quality assessment is based on acoustic emission levels. Unstable exhaust gas at high temperature flowing from internal combustion engine manifold may cause noise and disturbance conflicting with the high standard of acoustic comfort requested by this kind of vehicle. This research was involved in carrying out flow simulation model and analysis on an exhaust system design, and based on virtual data output from CFD tools and AVL-Boost software aiming at identifying the natural frequencies and mode shapes of its structural components, to ensure that external excitation sources do not lead to resonances. The objective of this study was to analyze the dynamic behaviour and to identify the overall characteristics of the exhaust gas, so that components sensitive to induced turbulent vortices may be identified and assessed relative to acceptance criteria for acoustic levels requested by technical specification.

Citation

SALAH Amroune , Mohamed Barhm, , (2019), The analysis and effects of flow acoustic in a commercial automotive exhaust system, Advances and Trends in Engineering Sciences and Technologies III, Vol:3, Issue:1, pages:197-202, CRC Press

Ce cours de dessin assisté par ordinateur (DAO) s'adresse aux étudiants de deuxième année science technologique filière de génie mécanique (Semestre 4). Il permettra aux étudiants d’acquérir les principes de présentation des pièces en dessin industriel en utilisant un logiciel (Solidworks, Autocad, Catia, Inventor, etc…). Il a pour objectif de lire les plans techniques d’ensemble et de détails et de rendre l’étudiant capable d'utiliser adéquatement les fonctionnalités en deux dimensions (2D) et en trois dimensions (3D) d’un logiciel de DAO sur des pièces simples de mécanique générale. Il a été établi à partir d’une compilation de plusieurs sources: livres, polycopiés préexistants et autres contributions disponibles librement sur Internet qui sont mentionnés dans la partie bibliographique à la fin de ce polycopié. Il n’a donc aucune prétention d’originalité. Je tiens à préciser que les exemples (sous forme de pièce mécanique) ont été réalisés sur le logiciel CATIA V5R20, ces pièces ont été choisies à partir des livres de dessin industriel et que leurs solutions (fichiers sources format Catpart, Catdrwing et Catproduct) se trouvent sur la plateforme MOODLE (site web de l’université Mohamed Boudiaf de M’sila). Et en termine ce polycopie (annexe) par des réalisations sur CATIA V5 des mini projets avec les étudiants de génie mécanique. L’objectif de ces mini projets est de concevoir un ensemble de pièces dans leur environnement, en prenant en compte les côtes communes. Les assemblages proposés sont des modèles simples qui existent au niveau de notre Hall Technologique (Université de M’ sila).

Citation

SALAHAmroune , ,(2018); Dessin Assisté par Ordinateur DAO,,Universitaires Europeennes

This study aims to assess the morphology and properties of fibers extracted from a wild natural plant largely available in Algeria known as Juncus effusus L. (JE). The morphology and diameter of the fiber bundles extracted from the stem of the JE plant were characterized by optical and scanning electron microscopy. The functional groups of the extracted lignocellulosic JE fibers were studied by FTIR, their thermal degradation behavior was investigated by TGA and their crystallinity was determined using X-ray diffraction technique. In addition, mechanical characterization was carried out using tensile tests on the lignocellulosic fiber in order to evaluate their strength, strain at break and Young's modulus. In view of the dispersion in the obtained experimental results, the latter were analyzed using the Weibull statistical laws with two and three parameters.

Citation

SALAH Amroune , Bezazi Abderrezak, Maache Mabrouk, , (2017), Characterization of a novel natural cellulosic fiber from Juncus effusus L., Carbohydrate polymers, Vol:171, Issue:2017, pages:163-172, Elsevier

The paper describes the manufacturing process and the characterization of the tensile mechanical properties of treated and untreated palm dates long technical fibres. The fibres extracted from Fruit Bunch Branch of Palm Date (FBBPD) have been subjected to alkaline treatment with different NaOH concentrations at room temperature. The experimental results show that the chemical technical fibre treatments provide an increase of the mechanical properties (tensile strength and Young’s modulus) under quasistatic tensile loading. A specific treatment leads a threefold increase of the failure stress. An analysis of stress at failure has been performed over a population of 630 samples using Weibull statistics with two and three-parameters, together with a one-way analysis of variance (ANOVA). FBBPD technical fibres show stiffness and strength performance comparable to the ones of agave Americana L fibres, and higher failure at strength than okra fibres.

Citation

SALAH Amroune , Bezazi Abderrezak, Belaadi Ahmed, , (2015), Tensile mechanical properties and surface chemical sensitivity of technical fibres from date palm fruit branches (Phoenix dactylifera L.), Composites: Part A, Vol:71, Issue:2015, pages:95-106, Elsevier