Browsing by Author "Aribi, Chouaib"

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Caractérisation des différents stratifies a base de matrices époxydes modifiées
(2019) Aribi, Chouaib
Ce travail discute le rôle de la matrice époxy dans les stratifiés composites. Plusieurs plaques ont été élaborées sous vide en utilisant différentes formulations de résines époxy, à savoir EPOCASTA50-1, résine sans dilution G50 et STR, résine diluée G35 et INJ et résine chargée AL afin de pouvoir réaliser une étude sur l’influence des spécificités techniques des différentes formules époxydiques sur le comportement mécanique des matériaux composites stratifies en statique, dynamique et à long terme, puis de déterminer les conséquences de ces différentes variations sur les stratifiés composites. La modification de la matrice influe sur les paramètres mécaniques statiques, surtout dans le sens des fibres ; cette modification est expliquée par le changement des paramètres rhéologiques qui précise le mode de transfert des charges vers le renfort. En terme dynamique, le module de perte est fortement influencé par cette modification et est inversement proportionnel avec l’inclusion des charges minérales, ce qui permet d’expliquer la stabilité thermique. Dans ce cas, cette modification est explicable par l’approche moléculaire de Zhurkov et l’approche énergétique d’Eyring
Development of functional active films from blend of gelatin with crude orange juice pomace pectin: Test for packaging of virgin olive oil
(Wiley-Blackwell, 2024) Chentir, Imene; Aribi, Chouaib; Tarchoun, Ahmed Fouzi; Kchaou, Hela; Lamri, Melisa; Nasri, Moncef; Trache, Djalal
The food packaging sector is focused on developing innovative materials to enhance food safety and quality while reducing environmental impact. Accordingly, this study aimed to develop packaging based on bovine gelatin (G) blended with crude sweet orange juice pomace pectin (SOPP) at different ratios (G/SOPP = 85/15, 65/35, 50/50, w/w). The obtained crude SOPP was highly methylated and exhibited antioxidant and antibacterial properties due to the presence of galacturonic acid (<70%) and phenolic compounds (58.2 ± 0.8 mg/g SOPP). High-performance liquid chromatography with diode array detection analysis revealed the presence of hesperidin, catechin, and naringin as major phenolic compounds in SOPP. Further, the incorporation of this latter improved gelatin-based packaging structural homogeneity, opacity, water vapour barrier features, glass transition temperature and tensile strength. G-SOPP (50/50) film showed efficient antibacterial activity against Escherichia coli and Bacillus subtilis and high antioxidant potential reaching values of 0.7, 48.7%, 76.7% and 68.9% for reducing power, β-carotene bleaching inhibition, DPPH (2,2-diphenyl-1-picrylhydrazyl) and ABTS+ (2,2′-azinobis-[3-ethylbenzothiazoline-6-sulphonic acid]) radicals scavenging activities, respectively. Another interesting finding is that the combination of G and SOPP reduced the oil solubility of G-SOPP films suggesting great physical integrity of the film over 63 days. The polyphenol content released from G-SOPP blend film in a fatty simulant increased as SOPP content of films was increased. G-SOPP (50/50) film, designed as a pouch, delays the photooxidation process of virgin olive oil over 63 days of storage time, without altering its organoleptic properties. Overall, these outstanding results highlighted the potential use of gelatin–pectin blend films for active packaging of oils and lipid-based foods.
Dielectric behavior study of thermosetting matrices loaded
(2012) Irekti, Amar; Hami, B.; Aribi, Chouaib; Bezzazi, B.
The present study was prospective in nature and its purpose is twofold. It consists, on the one hand, to identify and characterize mineral fillers, secondly, to determine the dielectric properties of materials prepared using the epoxy resin mixed with local inorg anic fillers , very rich in silica such that: sandy, pozzolan, cullet and a small calcium carbonate amount. This application allows us to use the matrix developed as an electrical insulator. The results of our study show that the use of fillers further im proves the dielectric properties of these matrices. After 32 days of conditioning, the values of capacitance and resistance obtained are very remarkable. Comparing our results with previous work with the addition of pure silica, we note that our composites have better properties at a low cost. The hygro - thermal influence is much less important fo r the loaded resin. Our composites may be subject to external environmental influences and they have a range of wide usage in dielectric materials
Elaboration and characterization of composite material based on epoxy resin and clay fillers
(Universidad Nacional Autónoma de México (UNAM), 2017) Laouchedi, Dalila; Bezzazi, Boudjema; Aribi, Chouaib
The present work aims at investigating the effect of locally produced clay (Algeria), along with the effect of their size and rate on physical and mechanical properties of the composite material. This study is divided into two parts: The first one is devoted to the study of the composite material based on epoxy resin with kaolin, using different size fractions at rates ranging from 2% to 20%. The second part examines epoxy resin-based composite with calcined kaolin (metakaolin) with regard to the influence of the structure, the particle size and the charge rate on the properties of the material. It is shown that the clay fillers give the epoxy resin different properties compared to the epoxy resin alone and, additionally, reduce the cost of materials. It was also observed that the fillers enhance the mechanical properties by increasing the rigidity of the material. There is a maximum value of 2.4 GPa to 18% kaolin, or more than 325% increase in the modulus of elasticity with respect to unfilled resin for the finer particle size. It was also found that the modulus of elasticity increases with increasing the loading rate. Indeed, the rigidity increases with increasing the filler rate. Moreover, for both fillers, lower fraction yields better results. Moreover, for both types of added fillers, lower fraction yields better results
Étude comparative du comportement des différents matériaux composites (différentes matrices)
(2012) Aribi, Chouaib
Ce travail présente une étude comparative de matériaux composites à base de différentes matrices époxydes. Ces matrices de type STR, AL et INJ812 sont caractérisées du point de vue physico-chimique et mécanique. Dans un premier temps nous avons mis en évidence l'influence des charges minérales et des diluants sur les propriétés des matrices. Les matériaux composites sont élaborés à l'aide de renfort en fibre de verre tissée [0/90]6. Les résultats obtenus montrent que les charges incorporées améliorent les performances de la matrice. Les matrices diluées présentent une plage de plasticité très importante, on note un module de Young et une contrainte maximale très faible. La caractérisation des stratifiés montre que ces charges diminuent la contrainte maximale à la rupture en traction tout en améliorant l'adhérence fibres-matrice. Les stratifiés à base de résine diluée présentent un module de Young important mais, une très mauvaise adhérence avec les renforts, cela s'explique par l'apparition du délaminage à partir de faibles contraintes de traction
Etude expérimentale de la réparation des structures d'aéronefs par collage des patchs à base d’époxy et fibre de verre = Experimental study of repair of aircraft structures by adhesive patches based on epoxy and fiberglass
(2019) Basaid, Djamel; Benmounah, Abdelbaki; Aribi, Chouaib; May, Abdelghani
Les matériaux composites présentent une faiblesse aux chocs et aux impacts, des études ont été effectuées par plusieurs chercheurs afin de minimiser les conséquences de ces défauts, qui mènent souvent à des réparations temporaires ou permanentes. La présente étude a pour objectif d'investiguer des cas de réparation des structures d'avions. Ces réparations sont appliquées aux défauts survenus sur les matériaux composites de la structure d'avion de type « Impact Faible Energie » en utilisant la méthode patch de composite à matrice époxy : EPOCASTA50-1, la résine est sans dilution renforcée par des tissus de fibres de verre de même type que celui du fuselage d'avion. L’efficacité de ces réparations est vérifiée par l’étude du comportement en traction classique. Pour la caractérisation à l'état endommagé et la validation des résultats, la méthode de contrôle non destructif CND a été utilisée sur des éprouvettes élaborées dans les mêmes conditions que les plaques de réparation fixées sur le fuselage d'avion
Etude expérimentale du comportement diélectrique et thermique des nano composites hybrides à matrice époxyde chargée
(2014) Irekti, Amar; Bezzazi, Boudjema; Aribi, Chouaib; Zibouche, Fatima
Experimental study of dielectric properties of composite materials pozzolan/DGEBA
(2015) Irekti, Amar; Bezzazi, Boudjema; Smith, Agnès; Aribi, Chouaib
Experimental study of environmentally Friendly composite materials Behavior in aeronautical applications
(2019) Basaid, Djamel; Benmounah, Abdelbaki; Aribi, Chouaib
This study is a part of a work in progress on the mechanical behavior of laminate in various modified epoxy matrices. we begin with a laminate six folds with fiberglass taffeta, and epoxy matrix cross linked by aliphatic Amine called MEDAPOXY STR, this resin is in the form of a kit of two elements ,a monomer and a hardener with the report weight of 0,67%. The treatment of the results shows that the reticulation of monomer by this Amine is incomplete what provokes a plastic domain on the mechanical behavior of the matrix, concerning composites made from these elements, the results show that the elastic domain is dependent on the elasticity of fibers used and not on the matrix. The control by ultrasound can be considered as another way to measure and follow-up of the parameters elasticity of the elaborate laminate
An experimental study on damaged cementitious mortars repaired by glass/epoxy composite materials
(Sciendo, 2020) Aribi, Chouaib; Bouaissi, Aissa; Safi, Brahim; Saidi, Mohammed
This paper presents an experimental investigation on the post-repair flexural response of mortars with and without damage. In order to improve the mechanical properties of the damaged mortars, which were subjected to different loads ranging between 40 % and 90 %, the mortars specimens were reinforced and repaired using two different composite materials, the first with only epoxy resin, while the second consisted of a mixture of epoxy resin and glass fiber. The results show a significant improvement in the stiffness damaged. Therefore, the reinforced specimens by a layer of resin on the lower side surface increased the bending strength by 58 %, when compared to those control samples. The reinforcement using composite resin-fiber of glass exhibited considerable increases in the safety of constructions. The SEM images of damaged samples with and without repair, revealed the impact of reinforced glass fibers-mortar on the matrix-mortar by improving theirs mechanical performances
FTIR analysis and rheological behavior of bisphenol : a diglycidyl ether resin filled Fume-Silica
(2014) Irekti, Amar; Bezzazi, Boudjema; Boualam, Chahrazed; Aribi, Chouaib; Dilmi, Hamid
Silica-fume as fillers into polymers materials affect significantly the physical, mechanical and the electrical properties of the polymers. The polymer that we studied here is an epoxy based resin (STR) and silica fume (FS). This paper presents the dependency of the rheological behavior of the STR epoxy resin on the FS content within a temperature at which the reaction thermoset is neglected. We used a cone-plate viscometer for the study of the rheological behavior, and a scanning electron microscope is used for the analysis of the dispersion state of the FS in STR epoxy resin. Compared to the control without loads, an increase of 50% of the shear stress and the plastic viscosity were recorded for the composite. The software Rheowine viscometer enabled us to model and identified the rheological behavior of these mixtures with resin. The results obtained in this modeling, confirmed that the resin mixtures have shear-thinning rheological behavior, this last give us the model of Ostwald de Waele
Highlighting of the distribution effect of steel hook fibers at low and high dosage on the flexural strength of self-compacting mortars
(2022) Kheddache, Lynda; Aribi, Chouaib; Chahour, Kahina; Safi, Brahim
In this paper, the distribution effect of low and high dosage steel hooked fibers on the flexural strength and mechanical behaviour of self-compacting mortars is investigated. Specimens were shaped so as to distribute the steel hooked fibers in three layers at different dosage (volume fraction of 0.25%, 0.40% and 0.50% respectively for each layer). The obtained results show that the mechanical behaviour in flexural and the flexural strength of the reinforced self-consolidating mortars were significantly influenced and directly depending on the fibers distribution per layer. This finding clearly shows the importance of the steel fibers distribution in the cement matrix during implementation has a major influence on the mechanical behaviour of mortars reinforced with metal fibers. The maximum value recorded is 14.5 MPa for the high dosage. The distribution of the steel fibers by layer made it possible to obtain a strength gain of 71.83% at low dosage and more than 100% at high dosage
Influence of the shrinkage and the slenderness of fibers on the properties of the mortars destined for the concretes fiber
(Mouloud Mammeri University of Tizi-Ouzou, 2015) Benyounes, Khaled; Aribi, Chouaib; Meziani, Ramzi; Benmounah, Abdelbaki
Mechanical and physicochemical characterization of an epoxy-based composite reinforced with fibrous biopolymer byproduct
(Springer, 2015) Malek, Ammar; Aribi, Chouaib
Mechanical properties and low-velocity impact analysis of camel hair and hybrid camel hair/flax fibre-reinforced epoxy
(Springer, 2024) Bencheikh, Amir; Nour, Abdelkader; Casimir, Jean B.; Aguib, Salah; Gherbi, Mohammed T.; Attia, Nourhane; Djedid, Toufik; Baali, Besma. R.; Aribi, Chouaib
Composite plates structures are subjected to many damage problems under low-velocity impacts such delamination and matrix cracking, in order to know the importance of hybridisation on improving mechanical properties. This study explores the low-velocity impact behaviour of two composites: one reinforced with camel hair fibre/epoxy (CHF/Epoxy) and the other with a hybrid of camel hair and flax fibres camel hair fibre–flax fibre/epoxy (CHF-Flax/Epoxy). Static tests (tensile, compression, and bending) were conducted to characterise the mechanical properties of the composites. Impact tests were performed using a drop weight impact machine at three energy levels (3, 7, and 20 J). Particularly, the hybrid composite plate (camel hair fibre/epoxy) exhibited superior mechanical properties in static tests, leading to enhanced impact resistance compared to the composite plate (camel hair fibre/epoxy). Additionally, a numerical study was conducted using a 3D finite elements model. The Hashin criteria and the progressive damage model were used to predict intralaminar damage, and surface-based cohesive behaviour with quadratic stress failure criteria was used to predict delamination. The progressive damage model was coded and its implementation is conducted with a user-defined material subroutine (VUMAT) for Abaqus/Explicit. The damage mechanism and energy dissipation were observed at each energy level. Matrix cracking occurred first, followed by delamination. The 3D damage model was able to simulate the damage initiation and damage evolution until failure. The results of the model showed good agreement with experimental results in term of force, displacement and energy dissipation curves.
Mechanical Properties of Alfa, Sisal, and Hybrid Alfa/Sisal Fiber Satin Cloth Reinforced Epoxy
(Springer Nature, 2024) Baali, Besma R.; Gherbi, Mohammed Tahar; Nour, Abdelkader; Casimir, J.B.; Saci, Rachid; Aguib, Salah; Attia, Nourhane; Aribi, Chouaib
The mechanical behavior of composites, made of an epoxy resin matrix reinforced by 30 and 40% of a satin cloth from long Alfa, sisal and hybrid Alfa/sisal fibers was studied. The fibers are obtained by extraction with elimination of binders such as pectins and lignin. For each type of fibers, appropriate and optimal chemical and thermal treatments were conducted within NaOH solution, to enhance both the fiber surface quality and the interfacial bonding between fibers and matrix. Fourier transform infrared (FTIR), scanning electron microscopy (SEM), and chemical decomposition of treated and untreated fibers lead to prove the treatment efficiency. The thermogravimetric (TGA) and differential thermogravimetric (DTG) analyses showed better thermal stability. Differential scanning calorimetry (DSC) made it possible to quantify the enthalpy changes which showed an increase in the amount of heat as a function of the increase in weight fraction of natural fibers. The endothermic reaction of the composites studied containing 30 wt% fiber reinforcement was less than that containing 40 wt% fiber reinforcement. The composite materials were produced by vacuum assisted resin transfer molding (VARTM) method due to hydrophilic nature of the fibers. The results of static tests were compared to those of pure epoxy resin. It showed a significant increase for 40 wt% woven A1lfa/epoxy of about 333, 113, and 81% in tension, 3-points bending and compression tests respectively. SEM morphology analysis revealed good interfacial adhesion between the treated fibers and the matrix.
The Optimal Values of Hashin Damage Parameters Predict Using Inverse Problem in a CFRP Composite Material
(Springer, 2024) Fahem, Noureddine; Belaidi, Idir; Aribi, Chouaib; Zara, Abdeldjebar; Khatir, Tawfiq; Oulad Brahim, Abdelmoumin; Capozucca, Roberto
The ever-increasing demand for advanced composite materials in industries like aerospace and automotive has spurred the drive to address their inherent weaknesses. This pursuit is facilitated by the availability of numerical simulations and artificial intelligence, offering a cost-effective means to comprehensively study various phenomena without excessive reliance on experimentation. While existing models in the scientific realm provide a foundation for composite material modeling, achieving results closely aligned with experimental data is often challenging due to the variation of the parameters and conditions. This present study introduces an innovative approach aimed at optimizing composite material performance and minimizing discrepancies between experimental and numerical outcomes. This approach leverages sophisticated optimization algorithms to fine-tune the Hashin damage parameters, resulting in a highly accurate model. Furthermore, the incorporation of an Artificial Neural Network (ANN) via an inverse problem based on Jaya’s algorithm solving strategy facilitates the prediction of optimal parameters, ensuring a significant reduction in error. This novel methodology presents a promising avenue for elevating the efficiency and reliability of CFRP composite materials in practical applications.
Rheological behavior of epoxy resin filled fume silica
(2014) Irekti, Amar; Bezzazi, Boudjema; Aribi, Chouaib; Hami, B.
Synthesis of resin from Alfa stem to applied as an adhesive corrosion-resistant coating
(Springer Nature link, 2025) Toubal, Sara; Aribi, Chouaib; Chentir, Imen; Safi, Brahim; Bouaissi, Aissa; Saidi, Mohammed
The demand for eco-friendly alternatives to petrochemical-based phenolic resins has risen due to increasing concerns about climate change, environmental impact, and manufacturing costs. This study introduces a sustainable approach by partially replacing phenol with lignin, a natural polymer rich in phenolic groups, extracted from Alfa stems. Using the alkaline method, 50% of phenol was substituted with lignin to synthesize phenol–formaldehyde (PF) resins. The synthesized lignin–phenol– formaldehyde (LPF) resin was characterized to verify its chemical structure and physical properties. The resin demonstrated significant antioxidant and antibacterial activity, particularly against E. coli and P. aeruginosa gram-negative bacteria at a concentration of 20 mg/ml. Additionally, the lignin substitution provided notable advantages over conventional industrial resin formulations. The lignin’s properties closely influenced the formulation of the LPF resin, making it similar to the reference CPF resin. However, the lower intensity observed in the LPF resin suggests potential limitations in the methylol group formation compared to the CPF resin. The antioxidant activity of LPF resin has been effectiveness in preventing cor- rosion on steel surfaces. When applied as an anti-corrosion coating and compared to industrially used CPF resins, LPF resin demonstrates its efficacy in such applications. Also, it should be noted that the impedance modulus of the elaborated resin coating remained consistently low throughout the entire immersion period, indicating its stable performance.