Abstract
This 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.
Highlights
Innovative control systems in the field of civil and mechanical engineering have become in recent years of great importance, they allow to design structures to resist, without significant damage, to dynamic actions, for example storms, great seismic action, etc
Numerical simulation and experimental were done of 3-point bending analysis in order to evaluate the bending stiffness by varying the intensity of the magnetic field
The main conclusions drawn from this work are as follows: 1) The quasi-static behavior of the beam is controlled by the adjustment of the rheological properties of the magnetorheological elastomer
Summary
Innovative control systems in the field of civil and mechanical engineering have become in recent years of great importance, they allow to design structures to resist, without significant damage, to dynamic actions, for example storms, great seismic action, etc. Magnetorheological elastomer (MRE) has attracted increasing research interest for the application in semi-active base isolation system to protect structures from seismic vibrations [1]. Hu et al [30] conducted an experimental study on the dynamic response of a sandwich beam containing two aluminum layers with a MRE core under non-homogeneous magnetic fields; it was shown that a reduction of 13.9 % is achieved on the first mode of transverse motion. The semi-active control of a MRE sandwich beam was investigated under different loadings [31]; results showed the changing stiffness and damping of the MRE layer controls the motion amplitude. The time response from the structure en MRE with applied of maximal force to the generation of the desired applied magnetic field intensity of is less than 3s, satisfying the requirement of real-time structural control
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