Isotropic magnetorheological elastomers(MREs)are smart materials fabricated by embedding magnetizable particles randomly into a polymer matrix.Under a magnetic field,its modulus changes rapidly,reversibly,and continu-ously,offering wide application potential in the vibration control area.Experimental observations show that there is a strong frequency,strain amplitude,and magnetic dependence of the dynamic behavior of isotropic MRE.Although import-ant for potential applications,the magnetic-dependent nonlinear dynamic behavior of isotropic MRE has received little the-oretical attention.To accurately evaluate the dynamic performance of isotropic MRE and to guide the design of isotropic MRE-based products,a new constitutive model based on continuum mechanics theory is developed to depict the magnetic-dependent nonlinear dynamic behavior of isotropic MRE.Subsequently,the numerical implementation algorithm is de-veloped,and the prediction ability of the model is examined.The model provides a deeper understanding of the underly-ing mechanics of the magnetic-dependent nonlinear viscoelastic behavior of isotropic MRE.Furthermore,the model can be utilized to predict the magnetomechanical coupling behavior of isotropic MRE and therefore serves as a useful plat-form to promote the design and application of isotropic MRE-based devices.
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