M. ZAOUI Moussa

Prof

Directory of teachers

Department

Departement of MECHANICAL ENGINEERING

Research Interests

Comportement, fatigue, endommagement, rupture des matériaux et des structures soudées. Conception et controle des soudures Caractérisation des matériaux composites

Contact Info

University of M'Sila, Algeria

Email : moussa.zaoui@univ-msila.dz

On the Web:

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Recent Publications

2024/2/15

Exploring tensile properties of bio composites reinforced date palm fibers using experimental and Modelling Approaches

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 …
Citation

M. ZAOUI Moussa, (2024/2/15), "Exploring tensile properties of bio composites reinforced date palm fibers using experimental and Modelling Approaches", [national] Materials Chemistry and Physics , DOI: 10.1016/j.matchemphys.2023.128810

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2024-12-31

Investigation on the Mechanical Behavior of Date Palm Fibers Reinforced Composites: Predictive Modelling Using Artificial Neural Networks (ANNs)

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 …
Citation

M. ZAOUI Moussa, (2024-12-31), "Investigation on the Mechanical Behavior of Date Palm Fibers Reinforced Composites: Predictive Modelling Using Artificial Neural Networks (ANNs)", [national] Journal of Natural Fibers , Taylor & Francis

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2024-12-16

Innovations in the Use of Bio composites for Renovating Buildings in Architecture

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 15%,
20%, 25%, and 30% with epoxy demonstrated optimal results at a fiber ratio of 15 %. This highlights recent
trends and innovations in the field.
Citation

M. ZAOUI Moussa, (2024-12-16), "Innovations in the Use of Bio composites for Renovating Buildings in Architecture", [international] Séminaire International Risques naturels, gestion des territoires urbains et outils d'analyse , université de M'sila

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2024-12-08

Palm fiber composites as innovative, sustainable materials for mechanical applications

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

M. ZAOUI Moussa, (2024-12-08), "Palm fiber composites as innovative, sustainable materials for mechanical applications", [national] SNEGD’24 , Universite de Mostaganem

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2024-11-18

Enhancing the Mechanical Characteristics of Eco-Friendly Composite Materials: Taguchi and RSM Optimization

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

M. ZAOUI Moussa, (2024-11-18), "Enhancing the Mechanical Characteristics of Eco-Friendly Composite Materials: Taguchi and RSM Optimization", [national] Journal of Natural Fibers , https://doi.org/10.1080/15440478.2024.2427704

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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

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

M. ZAOUI Moussa, (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", [international] ICTAM'24 , université de Sétif

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2024-10-13

Sustainable Bio composites: Manufacturing Methods and Their Applications

Sustainable bio composites are materials designed to fulfill current needs without compromising the
ability of future generations to meet theirs. These materials are eco-friendly and aim to minimize
environmental harm. To be classified as sustainable, bio composites must be assessed based on several
factors: the origin and production of raw materials, the manufacturing processes used, the lifespan of the
product, and waste management practices. Key considerations include energy consumption, chemical
usage, emissions, and potential toxic effects during use and disposal.
These bio composites can be produced using various techniques such as filament winding, lay-up,
extrusion molding, injection molding, compression molding, resin transfer molding, and sheet molding
compounds. They offer several advantages, including being lightweight, having high strength and
specific stiffness, low electrical conductivity, ease of bonding, good fatigue resistance, the ability to
store and release internal energy, low thermal expansion, and flexibility in design.
Sustainable biocomposites are used in many areas, including household products, building materials,
aerospace, circuit boards, and automotive applications. By incorporating natural fibers like jute, hemp,
sisal, kenaf, and flax, these materials promote biodegradability and can be produced on a large scale.
They help protect the environment and enhance the quality of life
Citation

M. ZAOUI Moussa, (2024-10-13), "Sustainable Bio composites: Manufacturing Methods and Their Applications", [international] Sémimaire Eau, Environnement et Energies Renouvelables (L3ER) , université de M'sila

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2024-10-02

NUMERICAL INVESTIGATION OF THE EFFECT OF FORCES ON THE PROCESS CRACK IN A COMPOSITE PLATE

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

M. ZAOUI Moussa, (2024-10-02), "NUMERICAL INVESTIGATION OF THE EFFECT OF FORCES ON THE PROCESS CRACK IN A COMPOSITE PLATE", [national] Academic Journal of Manufacturing Engineering , Academic Journal of Manufacturing Engineering- Editura Politehnica

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2024-07-06

EXAMINING AND DEVELOPING A MEDICALLY RELEVANT COMPONENT THROUGH REVERSE ENGINEERING

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
Citation

M. ZAOUI Moussa, (2024-07-06), "EXAMINING AND DEVELOPING A MEDICALLY RELEVANT COMPONENT THROUGH REVERSE ENGINEERING", [national] Academic Journal of Manufacturing Engineering , Academic Journal of Manufacturing Engineering- Editura Politehnica

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2024-06-17

Optimizing water Absorption’s influence on composite mechanics through response surface methodology

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

M. ZAOUI Moussa, (2024-06-17), "Optimizing water Absorption’s influence on composite mechanics through response surface methodology", [national] Journal of Composite Materials , https://doi.org/10.1177/00219983241264357

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2024-05-06

Analyse of stressesand boundaru conditionsin unidirectionnal Jute renforced polymer composite

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 15%,
20%, 25%, and 30% with epoxy demonstrated optimal results at a fiber ratio of 15 %. This highlights recent
trends and innovations in the field.
Citation

M. ZAOUI Moussa, (2024-05-06), "Analyse of stressesand boundaru conditionsin unidirectionnal Jute renforced polymer composite", [national] CNC2@2024 , université de M'sila

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2024-04-10

Assessment of mechanical and physicochemical properties of palm fiber composites: Effect of alkaline treatment and volume alterations

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

M. ZAOUI Moussa, (2024-04-10), "Assessment of mechanical and physicochemical properties of palm fiber composites: Effect of alkaline treatment and volume alterations", [national] Journal of Composite Materials , https://doi.org/10.1177/00219983241246614

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2024-04-01

FABRICATING A MOLD USING CNC TECHNOLOGY FOR COMPOSITE MATERIAL TENSILE TEST SAMPLES.

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.
Citation

M. ZAOUI Moussa, (2024-04-01), "FABRICATING A MOLD USING CNC TECHNOLOGY FOR COMPOSITE MATERIAL TENSILE TEST SAMPLES.", [national] Academic Journal of Manufacturing Engineering , Taylor & Francis

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2024-03-16

Examining the bending test properties of bio-composites strengthened with fibers through a combination of experimental and modeling approaches

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.
Citation

M. ZAOUI Moussa, (2024-03-16), "Examining the bending test properties of bio-composites strengthened with fibers through a combination of experimental and modeling approaches", [national] Journal of Composite Materials , https://doi.org/10.1177/00219983241240819

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2024-01-01

INVESTIGATION FOR THE AUTOMATED GENERATION OF TOOLPATHS ON A 3AXIS CNC MACHINE

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.
Citation

M. ZAOUI Moussa, (2024-01-01), "INVESTIGATION FOR THE AUTOMATED GENERATION OF TOOLPATHS ON A 3AXIS CNC MACHINE", [national] Academic Journal of Manufacturing Engineering , Taylor & Francis

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NUMERICAL ANALYSIS OF MECHANICAL PROPERTIES OF AUXETIC CELLULAR MATERIAL CONSISTING OF RE-ENTRANT HEXAGONAL, HONEYCOMBS AND STAR-FISH

Sandwich panels are important because they offer a lightweight and economical structure that can be used in various fields and has several geometric shapes. For this study, we chose three honeycomb shapes (Hexagonal, RE-entrant and Star fish) with dimensions of 57mm× 120mm and a thickness of 10mm. Aluminum type (Al 2024-T3) was used for the material. The design of the three honeycomb structures was carried out with CATIA V5R20 software, while the numerical analysis of their load capacity (tensile and compression) was carried out using the ABAQUS-CAE calculation code. A numerical study was also carried out to compare the results of the samples according to the different types of honeycomb used. The results showed that the RE-shaped structure had the highest load capacity in terms of tensile and compression. The maximum stress of 422.27 MPa was observed for the honeycomb-shaped structure RE-entering in traction. In contrast, the maximum tensile stress was lower for the starfish-shaped honeycomb, reaching a value of 145.5 MPa. For compression, the hexagonal honeycomb structure recorded the highest stress value of 590.5 MPa. The lowest stress value was measured for the starfish-shaped honeycomb structure, reaching 199.5 MPa.
Citation

M. ZAOUI Moussa, (2024-01-01), "NUMERICAL ANALYSIS OF MECHANICAL PROPERTIES OF AUXETIC CELLULAR MATERIAL CONSISTING OF RE-ENTRANT HEXAGONAL, HONEYCOMBS AND STAR-FISH", [national] ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING , Taylor & Francis

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2023-11-24

G-CODE GENERATION FOR MACHININING SPUR GEAR IN CNC MACHINES USING THE IMACHINING STRATEGY

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.
Citation

M. ZAOUI Moussa, (2023-11-24), "G-CODE GENERATION FOR MACHININING SPUR GEAR IN CNC MACHINES USING THE IMACHINING STRATEGY", [national] ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING , ACADEMIC JOURNAL OF MANUFACTURING ENGINEERING

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2023-03-15

Shielding performances of short carbon fibers and tungsten particles reinforced benzoxazine resin matrix composites

This present investigation reports, for the first time, the properties of the polybenzoxazine bio-based furfurylamine reinforced using the hybrid short carbon fibers and tungsten particles. The results revealed good compatibility between the matrix and the filers using scanning electron microscopy, due to the use of the silane treatment that led to enhanced interfacial bonding. In addition, the mechanical data disclosed that the bending and impact values were respectively increased to 210 MPa and 9 KJ/m2 for the composites containing 20%wt of the short carbon fibers and 20%wt tungsten particles. The hybrid composite shielding properties were evaluated using the cobalt-60 as an irradiation source, and the nuclear results depicted that the half-value length and the tenth-value length were increased as compared to those of the pure polymers. Based on the thermal stability studies, the reinforced hybrid composites also showed excellent thermal resistance.
Citation

M. ZAOUI Moussa, (2023-03-15), "Shielding performances of short carbon fibers and tungsten particles reinforced benzoxazine resin matrix composites", [national] Journal of Reinforced Plastics and Composites , https://doi.org/10.1177/07316844231163775

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2023

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

The presence of a geometric discontinuity in a material reduces considerably its resistance to mechanical stresses, therefore reducing service life of materials. The analysis of structural behavior in the presence of geometric discontinuities is important to ensure proper use, especially if it is about a material of weak mechanical properties such as the polymer. The objective of present work is to analyze the effect of the notches presence of variable geometric shapes on the tensile strength of epoxy-type polymer specimens. A series of tensile tests were carried out on standardized specimens taking into account the presence or the absence of a notch. Each series of tests contains 5 specimens. Two notch shapes were considered, circular (hole) and elliptical. The experimental results in terms of stress-strain show clearly that the presence of notches reduces considerably the resistance of the material where the maximum stress for the undamaged specimen was 41.22MPa and the lowest stress for the elliptical-notched specimen was11.21 MPa. A numerical analysis by the extended finite ele-ment 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 stress, strain, and Young's modulus in the presence of a notch in the material.
Citation

M. ZAOUI Moussa, (2023), "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", [national] Acta Mechanica et Automatica , https://www.researchgate.net/publication/366822868

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2022

Réalisation d'un scanner 3D pour la rétro conception des pièces mécaniques.

Lors des dernières décennies, la modélisation géométrique est devenue un outil précieux pour diverses applications dans de nombreux domaines tels que la
conception industrielle, comme les voitures, les bateaux etc. La retro conception 3D des surfaces des pièces par des moyens de mesures tridimensionnelles permet de donner en un temps relativement court une image des surfaces 3D sous forme d'ensembles des points. Les domaines d'utilisation de la retro conception sont très variés : la mécanique, l’art, l’architecture… . En ce qui nous concerne, nous nous intéressons à son application dans le domaine du génie mécanique pour des applications de duplication de formes qui consiste à reproduire la copie d’un objet à partir de ses surfaces numérisées. Dans ce contexte on a fait une étude sur la rétro conception des formes complexes, pour atteindre cet objectif, on a subdivisé notre travail en quatre chapitres Dans le premier chapitre nous avons fait une étude théorique sur la rétro conception avec un aperçu sur leur technologie. Et dans le deuxième chapitre on a présenté les différentes méthodes de rétro conception. Le troisième chapitre a été réservé à la méthode de rétro conception, on a choisi une forme complexe (ailette d’une turbine à gaz) et on a procédé à la numérisation de cette pièce à l’aide d’un scanner FARO, on tient à signaler que ce travail a été réalisé dans l’entreprise MEI (Sonlegaz Draa Alhadja M’sila).Après l’acquisition des données sous forme de nuage de points (Fichier texte), On a fait la reconstruction de la forme avec le logiciel CATIA V5. La partie fabrication a été réservé pour le chapitre quatre. Et à la fin on a clôturé notre étude par une conclusion générale.
Citation

M. ZAOUI Moussa, (2022), "Réalisation d'un scanner 3D pour la rétro conception des pièces mécaniques.", [national] Université de M'sila

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Investigation of mechanical, physico-chemical and thermal properties of new fiber from Silybum Marianum bark fiber.

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.
Citation

M. ZAOUI Moussa, (2022), "Investigation of mechanical, physico-chemical and thermal properties of new fiber from Silybum Marianum bark fiber.", [national] Journal of Composite Materials , DOI: 10.1177/00219983221090020

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Correlation assessment and modeling of intra-axis errors of prismatic axes for CNC machine tools

This paper presents an experimental study conducted to assess the correlation between the intra-axis errors of prismatic
axes for CNC machine tools. The validity and reliability of parametric models for the modeling of intra-axis errors (IAEs)
of CNC machine tools in the context of indirect calibration are also assessed in this work. Three CNC machine tools with
various controllers and guidance technologies were tested using two different measuring instruments. Two predictive models,
namely Bézier and B-spline curves, are described and compared for the first time in this work. Both models are experimentally
evaluated for accuracy and predictive efficiency using four evaluation criteria and new data sets from the three tested
CNC machine tools. Results show a strong correlation between the positioning errors and the pitch and yaw errors for all
the tested machines. The results also show that both proposed models are appropriate for the modeling of intra-axis errors,
with the B-spline curves coming slightly on top in terms of performance. Moreover, with the same number of control points
(n = 5), the two models provide residuals that are lower than the repeatability of the machine for most intra-axis errors tested.
This experimental study thus confirms that a Bézier model of degree four and a B-spline model of degree two, both with five
control points, are sufficient to represent the intra-axis errors for the tested CNC machine tools.
Citation

M. ZAOUI Moussa, (2022), "Correlation assessment and modeling of intra-axis errors of prismatic axes for CNC machine tools", [national] The International Journal of Advanced Manufacturing Technology , https://doi.org/10.1007/s00170-022-09074-7

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Extraction and characterization of novel natural lignocellulosic fibers from Malva sylvestris L.

The main goal of this study is to characterize natural lignocellulosic fibers extracted from Malva Sylvestris. The experimental approach used is consisted to analyze the morphological, physical, chemical, thermal and mechanical characteristics of Malva sylvistris fibers. The stem anatomy showed that the bark of Malva is rich in fiber cells. Based on ATR-FTIR and X-ray analysis, the obtained results illustrated that the fiber contained mainly cellulose, hemicellulose and lignin. The crystallinity index of fiber is about 55.12 %, which indicated a high cellulose content. The Thermo-gravimetric analysis (TGA) analysis test point out that Malva Sylvestris fibers are thermally stable until 225°C and an apparent activation energy about of 111 kJ.mol−1 was recorded. Tensile strength of Malva fibers is about of 236.64 ± 93.33 MPa whilst its young’s modulus is about of 26.07 ± 5.14 GPa. In view of the dispersion in the obtained experimental results, the latter were analyzed using the Weibull statistical laws with two parameters.
Citation

M. ZAOUI Moussa, (2022), "Extraction and characterization of novel natural lignocellulosic fibers from Malva sylvestris L.", [national] Journal of Composite Materials , Journal of Composite Materials

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Study and numerical simulation of the stress intensity factor of cracked plates

Stress intensity factor solutions for several simple plate geometries loaded by tension and bending are available in parametric form (see e.g. [1], [12]). However, for more general cases involving more complex geometry, numerical methods such as the boundary element method (BEM) or the finite element method (FEM) must be used for evaluation of fracture mechanics parameters. For the last two decades, the FEM has been applied to shear deformable plate bending problems (see e.g. [7], [8], [9]). More recently Viz et al. [13], [14] and Huang et al. [15] computed membrane and bending stress intensity factors for thin plate based on Kirchhoff plate theory.
The dual boundary element method (DBEM), has been developed to solve many applications in fracture mechanics e.g. elasticity, thermoelastic, concrete cracking, elastoplastic, stiffened panel, and dynamic fracture mechanics, (see reviews by Aliabadi [2], [3]), and more recently extended by Dirgantara and Aliabadi [4] to solve problems of plates loaded in combine bending and tension.
The most important feature of boundary elements is that it only requires discretisation of the boundary rather than the domain. The BEM provides a continuous modelling of the interior since no discretisation of the interior is required, therefore it can give a high resolution of interior stresses and displacements.
Citation

M. ZAOUI Moussa, (2022), "Study and numerical simulation of the stress intensity factor of cracked plates", [international] 2nd international seminar on industrial engineering and applied mathematics (ISIEAM22) , Skikda

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The effect of the meshing technique on cracking and its extension in a bio composite plate

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%.
Citation

M. ZAOUI Moussa, Saada.Khalissa@univ-msila.dz, , (2022), "The effect of the meshing technique on cracking and its extension in a bio composite plate", [international] ICEANS 2022 , Konya/Turkey.

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THE STUDY OF MATRIX ADHESION BETWEEN PLANT FIBERS AND RISIN

The objective of this paper is to study the effect of fibre alignment and treatment of fibres by alkalization on the mechanical properties of natural fibre composites using polyester resin as a matrix. The aim was to examine the performance of a standard laminating resin, used conventionally with glass fibre, and used instead as a matrix for natural fibres. A thorough study of the mechanical behaviour of the composites in flexure and impact is presented here, together with differential thermal analysis (DSC) and dynamic mechanical thermal analysis (DMA).
Citation

M. ZAOUI Moussa, mansour.Rokbi@ univ-msila.dz, , (2022), "THE STUDY OF MATRIX ADHESION BETWEEN PLANT FIBERS AND RISIN", [international] ICENSOS 2022 , Konya, Turkey

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2021-03-02

Conception et réalisation d'un système de variation de l'angle de calage d'une éolienne à axe horizontal

Il s'agit d'une de la Conception et réalisation d'un système de variation de l'angle de calage d'une éolienne à axe horizontal lors de la variation de la vitesse du vent
Citation

M. ZAOUI Moussa, houcine.makri@univ-msila.dz, , (2021-03-02), "Conception et réalisation d'un système de variation de l'angle de calage d'une éolienne à axe horizontal", [national]

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2021

Experimental investigations of surface wear by dry sliding and induced damage of medium carbon steel

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.
Citation

M. ZAOUI Moussa, (2021), "Experimental investigations of surface wear by dry sliding and induced damage of medium carbon steel", [national] Diagnostyka , https://doi.org/10.29354/diag/134116

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Manufacturing of rapid prototypes of mechanical parts using reverse engineering and 3D Printing

This article focuses on the design and manufacture of mechanical parts that have complicated shapes using the technique of reverse design using a scanner or an MMT for data acquisition in the form of a point cloud, using CAD software (CATIA). The digital model created is used for a virtual representation of the final product. Then we get the physical model on a 3D printer (also called additive manufacturing process) for later use in sand moulds. To have the imprint in the sand mould, we go through the fusion of the physical model (part). The use of this technique in the industry, allows us to save a lot of time in terms of model preparation and simple to implement, especially if it is mechanical parts that do not have a definition drawing, or they are worn out, then structural analysis was applied on the model using FE based software and tools to prove the quality of the product. Von Mises equivalent strains and stresses were predicted and decreased with increasing areas and honeycomb thickness. The objective of this article is to give an overview of this relatively modern technology and its various applications.
Citation

M. ZAOUI Moussa, (2021), "Manufacturing of rapid prototypes of mechanical parts using reverse engineering and 3D Printing", [international] Journal of the Serbian Society for Computational Mechanics , https://www.researchgate.net/publication/359506574

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EVALUATION OF MATERIALS FROM THE EXCAVATION OF THE OUENZA HEMATITE DEPOSIT (NORTH-EAST ALGERIA) BY GRAVIMETRIC ENRICHMENT

Quarries and mines that exploit hematite ore Fe2O3 usually have a large quantity of waste rock with low iron content, stored in the slag heaps of quarries or mines without enrichment. This work consists in finding solutions to this product to make it more or less usable in industries. As an example of use, the Fe2O3 content in the clinker after grinding and homogenisation varies between 1 and 8%. Africa. After chemical and mineralogical analysis of the whole product, the large percentage of existing chemical elements is the hematite ore Fe2O3 which has a low iron concentration. To improve its iron content, it must be treated by chemical and hydro mechanical processes that are economically viable. Since it remains in the product heap, it will be degraded in the open air of the quarry by atmospheric chemical reactions. A certain amount of this stockpile is sampled at different locations in a heap to distinguish the chemical elements of the dominant product. The search for good enrichment techniques of these materials after their homogenisation led us to choose among the main separation operations, those based on the difference of densities obtained by suspension in granulated Ferro-solutions composed of silicon and magnetite. From the results of the gravimetric separation, three fractions were obtained: an iron-rich fraction with a content > 45%; a medium fraction with an iron content of 45 to 10%; an iron-poor fraction <10%. The two fractions rich in iron and poor in iron are eliminated at the beginning of the enrichment operations. According to the magnetic properties analysis, as a semi-separated product, the medium iron fraction will undergo a new enrichment sequence by high magnetic field separation.
Citation

M. ZAOUI Moussa, (2021), "EVALUATION OF MATERIALS FROM THE EXCAVATION OF THE OUENZA HEMATITE DEPOSIT (NORTH-EAST ALGERIA) BY GRAVIMETRIC ENRICHMENT", [international] 4rd INTERNATIONAL SCIENTIFIC AND TECHNICAL CONFERENCE , PETROȘANI, ROMANIA

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2020

Characterization and mechanical behaviour of similar and dissimilar parts joined by rotary friction welding

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.
Citation

M. ZAOUI Moussa, (2020), "Characterization and mechanical behaviour of similar and dissimilar parts joined by rotary friction welding", [national] Engineering Solid Mechanics , https://www.researchgate.net/publication/341990368

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Effect of Pre-post TIG Welding Heat Treatment on Ni Superalloy

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.
Citation

M. ZAOUI Moussa, (2020), "Effect of Pre-post TIG Welding Heat Treatment on Ni Superalloy", [national] Annals of Dunarea de Jos University of Galati , DOI: 10.35219/awet.2020.05

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EFFECT OF PRE-POST TIG WELDING HEAT TREATMENT ON CAST NI SUPERALLOY

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.
Citation

M. ZAOUI Moussa, H. Gauss, , (2020), "EFFECT OF PRE-POST TIG WELDING HEAT TREATMENT ON CAST NI SUPERALLOY", [national] ANNALS OF DUNAREA DE JOS UNIVERSITY OF GALATI, FASCICLE XII, WELDING EQUIPMENT AND TECHNOLOGY , Galati University Press

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2019

An application of the theory of optimal control for the resolution of an aerodynamics problem

In this article we would like to show an application of the theory of optimal control to the resolution of an aerodynamic problem. This problem consists in determining the shape of a solid body, moving in a gaseous medium with minimal resistance. This problem is tackled by Newton in his work "The mathematical principles of natural philosophy" and the study of its resolution is a problem always present in modern supersonic aerodynamics especially for the construction of flying machines at high altitude with very large speeds.
Citation

M. ZAOUI Moussa, (2019), "An application of the theory of optimal control for the resolution of an aerodynamics problem", [international] ICCMAS2019 , turquie

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Structural, morphological and mechanical properties of hyperbranched polymers coated carbon fibers reinforced DCBA/BA-a composites

In this work, short carbon fibers were first surface-grafted with various amounts of epoxy terminated hyperbranched polymers, and then utilized as reinforcing phases in various thermosetting polymeric blends composed of dicyanate ester of bisphenol-A (DCBA) and bisphenol-A based benzoxazine (BA-a) resins. The Fourier Transform Infrared Spectroscopy (FTIR) test validated the surface modification of the short fibers and confirmed the reaction between the coated fibers and the DCBA/BA-a resin blend. The composites’ mechanical properties were evaluated and the obtained results revealed that at the maximum fiber loadings, the bending strength and modulus as well as the impact strength were identified to be 217.8 MPa, 7.1 GPa, and 18.4 kJ/m2, respectively. The scanning electron microscope (SEM) analysis established that the enhancements were basically attributed to the good dispersion and adhesion of the coated carbon fibers within the resin matrix.
Citation

M. ZAOUI Moussa, (2019), "Structural, morphological and mechanical properties of hyperbranched polymers coated carbon fibers reinforced DCBA/BA-a composites", [national] Composite Composite Interfaces …, 2019 - , Taylor & Francis , chine

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Improvement of welded pipe joints for mining equipment

Mining enterprises use many steel pipes for pumping sludge from ore dressing waste. These pipes are often repaired by welding. This work requires a lot of time and high quality connections. In this re-gard, the research below have been performed.
The macrographic examinations enabled us to conclude that, the weld bead has a satisfactory penetration lacking defect. They confirm the visual examinations which reveals a regular cord and of beautiful aspect. It is noticed that the heat treatment does not change the mac-rographic structure except on the level of dimensioning of the grains. This obliges someone to see the size and the nature of the grains by micrographic examinations. The zone of connection is the seat of a thermal contribution in short and rather important conditioning the enlargement of the grains and the formation of an acicular structure, It is thought that the zone of overheating is the seat of structures which have the reduced plastic properties of the welding and weaken the structure slightly. The structure of our product after welding is pri-marily ferritic with some small islands or beaches of pearlite (per-centage of weak carbon).
External master keys (4th and 5th)
Citation

M. ZAOUI Moussa, (2019), "Improvement of welded pipe joints for mining equipment", [international] Improvement of welded pipe joints for mining equipment , PETROȘANI, ROMANIA

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2018

Etude ntaleeerimexp de la dechirure ductile des aciers à haute résistance pour gazoducs

This study was performed to evaluate fracture toughness in heat-affected zone (HAZ) of X80 pipes welded using gas metal arc welding (GMAW). The J integral of Rice, was used to analyze the harmfulness of defects in welds. Mechanical properties such as strength, work-hardening and ductility in the HAZ were also characterized in order to conduct numerical analysis on the fracture toughness by a damage model. The numerical simulation of ductile tearing performed using the Rice-Tracey model based on the growth of voids, has highlighted the importance of parameters related to the model; in the case of a rate over matching Importantly.
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Keywords: : Weldments, X80 steel, Ductile fracture, local approach,
Citation

M. ZAOUI Moussa, (2018), "Etude ntaleeerimexp de la dechirure ductile des aciers à haute résistance pour gazoducs", [international] ICAMRE , Boumerdas

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similation of motion errors from circular tests for CNC machines predictive maintenance programs

Le moyen non destructif de mesure des contraintes résiduelles le plus répandu est la
diffraction des rayons-X (DRX). La détermination des contraintes résiduelles par les
méthodes de diffraction est basée sur la mesure des angles pour lesquels l’intensité diffractée
est maximale lorsqu’une structure cristalline est irradiée par des rayons X. A partir de ces
angles, la loi de Bragg donne la distance d(hkl) entre les plans du réseau cristallin dont la valeur
dépend du champ de contrainte au sein du matériau étudié.
Citation

M. ZAOUI Moussa, (2018), "similation of motion errors from circular tests for CNC machines predictive maintenance programs", [international] ISIEAM , skikda

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experimental study of ductil fractur in weldments

The residual stresses in a component or structure are stresses caused by incompatible internal permanent strains. They may be generated or modified at every stage in the component life cycle, from original material production to final disposal. Welding is one of the most significant causes of residual stresses and typically produces large tensile stresses whose maximum value is approximately equal to the yield strength of the materials being joined, balanced by lower compressive residual stresses elsewhere in the component.
Citation

M. ZAOUI Moussa, (2018), "experimental study of ductil fractur in weldments", [international] ICAME , Turquie

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01.10.2023

Prediction of mechanical behavior of epoxy polymer using Artificial Neural Networks (ANN) and Response Surface Methodology (RSM)

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 stress).
Citation

M. ZAOUI Moussa, (01.10.2023), "Prediction of mechanical behavior of epoxy polymer using Artificial Neural Networks (ANN) and Response Surface Methodology (RSM)", [national] Frattura ed Integrità Strutturale , DOI: 10.3221/IGF-ESIS.66.12

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