Investigating the Effect of Static Pre-Strain on Tension-Compression Mode Properties of Isotropic Magnetorheological Elastomer

Document Type : Research Article

Authors

1 Faculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran

2 Faculty of Chemical and Materials Engineering-Shahrood University of Technology

3 Faculty of Mechanical Engineering-Shahrood University of Technology

Abstract

Nowadays, the utilization of smart materials is experiencing rapid growth across a wide range of industrial systems. Magnetorheological elastomers are a class of smart materials and possess two unique features, i.e. adjustable hardness and damping capabilities. These characteristics make them widely used in various industrial applications. Hence, understanding their behavior in different systems is necessary. The focus of this work is to study the dynamic behavior of magnetorheological elastomers under different static pre-strains in tension-compression mode. In this study, three isotropic samples were fabricated and the force-deflection features of them were acquired under harmonic excitation with various strain amplitudes, static pre-strains, frequencies, and magnetic flux densities. Assess the effect of static pre-strain on the dynamic response of the magnetorheological elastomers, studying the effects of other parameters like strains, frequencies, and magnetic flux densities on the dynamic modulus of magnetorheological elastomers, and proposing a novel phenomenological-based model to predict the viscoelastic behavior of magnetorheological elastomers are the innovative aspects of this study. The results showed that the dynamic modulus of magnetorheological elastomers will increase by superimposing the static pre-strain. Furthermore, the relative MR effect decreases when the static pre-strain is applied. The maximum relative MR effect of 288.3158% have been achieved at a strain of 4%, a frequency of 7 Hz, and a static pre-strain of 0%.

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Amirkabir Journal of Mechanical Engineering
Volume 55, Issue 10
January 2024
Pages 1233-1260

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