Abstract
The purpose of this work is to analyze the nonlinear magneto-mechanical behavior of sandwich structures with a magnetorheological elastomer (MRE) core subjected to a permanent magnetic field. A detailed study is first carried out to characterize the mechanical behavior of these structures. The tests were carried out in three-point bending on beams of these complex materials for several distances between supports. An experimental study of the static response, is realized using a Zwick 2.5kN machine, allows to measure displacements as a function of force. The results deduced from the numerical simulation by the Abaqus software are compared with those obtained from the theoretical analysis. This study made it possible to show that these structures exhibit a non-linear behavior even at small deformations due to the rheological parameters which are more sensitive by the application of a magnetic field.
Highlights
Composite materials are materials with high mechanical properties; its mechanical properties are outperforming those of each of its components taken separately
It can be seen that the breaking force is about of 115 N for the test of the part subjected to a magnetic field intensity of zero
The specimen subjected to a magnetic field intensity of 0.5T is quite far from the rupture
Summary
Composite materials are materials with high mechanical properties; its mechanical properties are outperforming those of each of its components taken separately. Bingbing Kang et al [12] have studied the influence of parameter modifications on nonlinear mechanical properties On this basis, they designed a Ruzicka vibration damping model high static-low-dynamic and studied its vibration isolation characteristics. Based on the above works, the static study and characteristics of bending sandwich beam were investigated in this present paper By this way, we have studied the influence of the magnetic field and the length of the adaptive beam on the amplitude of transverse displacement; we have developed an adaptive structure to dampen the amplitude of the displacements in the form of high energy dissipation. Nilsson works were interested in a sandwich structure where skins are homogeneous materials In this case, if the equilibrium equation, written as a function of the longitudinal elasticity and the shear moduli of the beam, is given by: dM (x) dx GA eq x.
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