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Magnetorheological elastomers (MREs) are smart composite materials whose viscoelastic properties can be varied upon the application of an external magnetic field. MRE-based systems can provide field dependent variable stiffness and damping simultaneously due to viscoelastic properties of MREs. This unique behavior of MREs enables them to be effectively utilized in the development of adaptive isolators or absorbers to suppress vibrations in wide range of frequencies. The present study aims to investigate the capability of different viscoelastic models to predict the response behavior of MREs under varying dynamic loading conditions. To this end, MRE samples with a 25% volume fraction of ferromagnetic particles were fabricated and tested under shear mode. The field dependent viscoelastic models based on Kelvin–Voigt, Maxwell, Standard Linear Solid (SLS), and Generalized Maxwell (GM) are then formulated to predict the variation of storage and loss moduli under different driving frequencies and applied magnetic flux densities. Results indicate an inability of Kelvin-Voigt, Maxwell and SLS models to reasonably estimate the MRE's mechanical behaviour under different magnetic flux densities and excitation frequencies, whereas the GM model with seven parameters was able to accurately predict the field-dependent and frequency-dependent characteristics of MREs.
Naini et al. (Thu,) studied this question.