Browsing by Author "Tawfiq, I."
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Item Dynamic Analysis of the Non-Linear Behavior of a Composite Sandwich Beam with a Magnetorheological Elastomer Core(2016) Chikh, N.; Nour, Abdelkader; Aguib, Salah; Tawfiq, I.This work deals with the active control of the vibrations of mechanical structures incorporating magnetorheological elastomer. The damping coefficient and shear modulus of the elastomer increase when exposed to a magnetic field. Compared with the vibration control where the elastomer is permanently exposed to a magnetic field, the control of this process through time reduces vibrations more effectively. The experimental study for the vibrations of a sandwich beam filled with an elastomer is conducted, followed by a numerical study using the Abaqus code. The vibration damping is found to be dependent on the loading rate of micro-size ferromagnetic particles in the elastomerItem Modeling a Composite Reinforced with Short Alfa Fibers to Determine its Fatigue and Structural Homogenization(Springer, 2018) Nour, Abdelkader; Mechakra, Hamza; Benkoussas, B.; Tawfiq, I.; Settet, A. T.; Renane, R.The fatigue and homogenization of polypropylene reinforced with untreated and chemically treated short Alfa fibers were investigated using a modified Mori–Tanaka model. The polypropylene with chemically treated fibers showed a higher resistance than that with untreated ones. Cylindrical fibers with elliptical cross sections were used in experiments. Their mechanical characteristics were determined by the inverse method.Item Numerical simulation of the nonlinear static behavior of composite sandwich beams with a magnetorheological elastomer core(Elsevier, 2016) Aguib, Salah; Nour, Abdelkader; Benkoussas, B.; Tawfiq, I.; Djedid, T.; Chikh, N.