Publications Scientifiques
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Item The Advancing Understanding of Magnetorheological Fluids and Elastomers: A Comparative Review Analyzing Mechanical and Viscoelastic Properties(Multidisciplinary Digital Publishing, 2025) Rouabah, Salah; Didouche, Fadila-Yasmina; Khebli, Abdelmalek; Aguib, Salah; Chikh, NoureddineMagnetorheological fluids (MRFs) and elastomers (MREs) are two types of smart materials that exhibit modifiable rheological properties in response to an applied magnetic field. Although they share a similarity in their magnetorheological response, these two materials differ in their nature, structure, and mechanical behavior when exposed to a magnetic field. They also have distinct application differences due to their specific rheological properties. These fundamental differences therefore influence their properties and applications in various industrial fields. This review provides a synthesis of the distinct characteristics of MRFs and MREs. The differences in their composition, rheological behavior, mechanical properties, and respective applications are summarized and highlighted. This analysis will enable a comprehensive understanding of these differences, thereby allowing for the appropriate selection of the material based on the specific requirements of a given application and fostering the development of new applications utilizing these MR materialsItem Numerical simulation and experimental analysis of magneto-mechanical behavior of anti-seismic active sandwich structure(Extrica, 2019) Zerrouni, Nassim; Aguib, Salah; Grine, Ali; Chikh, NoureddineThis work focuses on the quasi-static behavior study for simply supported sandwich beams with aluminum faces and magnetorheological elastomer core subjected to three points bending subjected to a magneto-mechanical loading by numerical and experimental investigations. The mechanical properties of the magnetorheological elastomer core are measured experimentally and the mechanical behavior of the MRE was identified by the generalized Maxwell rheological model. Depending upon the adjustable properties of the beam, energy dissipation is by core shear. A systematic series of experiments and finite elements simulations have been performed in order to assess the static behavior of the beam. The results obtained show a significant influence of the magnetic field intensity on the flexural displacement of the beam.Item Classifying Surface Fault in Steel Strips Using a Customized NasNet-Mobile CNN and Small Dataset(ESRGroups, 2024) Kateb, Yousra; Khebli, Abdelmalek; Meglouli, Hocine; Aguib, Salah; Khelifi-Touhami, Mohamed SalahSteel metal is an important product in ferrous manufacturing, and the manufacturing process has to be improved so that hot-rolled strip flaws may be correctly identified. Machine-learning- based automated visual inspection (AVI) systems have been created, however they lack crucial components, such as inadequate RAM, resulting in complexity and sluggish implementation. Long execution times also result in delays or incompleteness. A scarcity of faulty samples further complicates steel defect diagnosis due to the disparity between non-defective and defective pictures. To overcome these difficulties, a deep CNN model is built using the pre- trained NasNet-Mobile backbone architecture. The model, which uses 26 times less data than other papers' datasets, recognizes steel surface pictures with six faults with 99.30% accuracy, outperforming previous methods. This study is beneficial for surface fault classification when the sample size is small, the software is less effective, or time is limited. Avoiding these issues will improve safety and end product quality in the steel industry, saving time and moneyItem 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, ChouaibThe 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.Item Experimental characterization of microcomposite magnetorheological elastomer(2021) Rouabah, Salah; Aguib, Salah; Hadji, Mohamed; Kobzili, LalliaThis work presents an analysis experimental of dynamic properties of microcomposite magnetorheological elastomer (MMRE) by a dynamic mechanical analyzer (DMA). The charge of magnetized iron particles is 30% of the total volume. A dynamic mechanical analysis DMA was carried out, in the scanning mode of the amplitude of shear strain, and for magnetic field densities varying from 0mT to 325mT. The storage modulus G’ and the loss modulus G’’, of the elastomer decrease, when the amplitude of the strain increases. This trend is more pronounced under a higher magnetic flux density (250mT and 325mT). In the presence of the magnetic field, the level of these two dynamic moduli and of the damping increases considerably, passing from one value to another of the applied external magnetic field. As a result, the MR effect of MRE elastomers has increased significantly with increasing magnetic flux densityItem Predictive modelling and optimisation of surface roughness in turning of AISI 1050 steel using polynomial regression(2020) Harhout, Riad; Gaceb, Mohamed; Haddad, Sofiane; Aguib, Salah; Bloul, Benattia; Guebli, AdelhamidAn investigation has been conducted to address the surface integrity optimisation and prediction issue by applying the polynomial regression method for a variety of experiments and cutting conditions. A higher correlation coefficient (R²) was obtained with a cubic regression model, which had a value of0.9480 for Ra. The use of the response surface optimisation and composite desirability show that the optimal set of machining parameters values are (250m/min, 0.2398 mm/rev and 2.3383 mm) for cutting speed, feed and depth of cut, respectively. The optimised surface roughness parameter and productivity are Ra =2.7567 μm and Q = 95.341*103 mm3/ min, respectively. Results show that the models developed can accurately predict the roughness on the basis of measured cutting conditions as input parameters, and can also be used to control the surface roughness by making a comparison between measured and estimated values. Furthermore, operators can benefit from the proposed models if the aim is the reverse determination of the cutting conditions corresponding to the requested roughness profileItem Effects of the geometrical parameters of the core on the mechanical behavior of sandwich honeycomb panel(2019) SETTET, Tidjani Ahmed; Aguib, Salah; Djedid, Toufik; Chikh, Noureddine; Chellil, AhmedThe present work is the study of mechanical behavior due to variation of the geometrical parameters in the core of the sandwich honeycomb panel. This study has allowed us to increase or decrease the strains and stresses of the panel, in changing the angle of alveolus, as explained and described below. In taking into consideration the results obtained previously to improve the mechanical properties and increase the adhesion of different parts of the panel, without changing the adhesive, we have conceived two new models, in increasing the contact surfaces in boundary of each part of the panel and giving a conical hexagonal shape in his corpItem Study and analysis of the Magneto-Mechanical behavior of smart composite sandwich beam in elastomer(2019) Settet, Ahmed Tidjani; Aguib, Salah; Nour, Abdelkader; Zerrouni, NassimItem Experimental analysis of the thermal effect of the magneto-mechanical behavior of viscoelastic elastomer(2019) Tourab, Mohamed; Aguib, SalahThis paper is devoted to an experimental of the thermal effect of the magnetomechanical behavior of elastomer; the latter is loaded with 25% of ferromagnetic particles of micrometric size; developed under the action of a magnetic field. The characterization of the rheological properties and the interaction between the micron size ferromagnetic particles as a function of the intensity of the magnetic field are studied under the effect of different temperatures. The results obtained clearly show the high energy dissipation properties of the composite, accentuated by the structure modified under the thermal effect, which gives properties of viscoelastic structures that can be adjusted as a function of the intensity of the magnetic fieldItem Vibration control of a hydrostatic bearing using magnetorheological elastomer shell bearing(JVE International, 2018) Chikh, Noureddine; Aguib, Salah; Djedid, Toufik; Nour, Abdelkader; Tawfiq, ImadIn rotating machines, random movements or sliding movements of the rotor in its housing can produce undesirable phenomena for some parts. To solve this problem, a new hydrostatic bearing with an intelligent magnetorheological elastomer sell bearing has been designed to control the undesirable vibrations of rigid rotors. The different effects of the influence parameters on the vibratory behavior of the sell bearing are calculated numerically using Abaqus software, and the results found are encouraging