Abstract
The time-dependent performance of magnetorheological elastomers (MREs) under a magnetic field is important for the precise control of smart devices based on MREs. Here, the transient responses of anisotropic magnetorheological elastomers, including magnetic field-induced storage modulus (ΔG′) and loss modulus (ΔG″), were investigated under different step magnetic fields. The results indicated that ΔG′ increased over time while ΔG″ decreased after the initial jump in the loading stage of the step field. ΔG′ quickly dropped to 0, while ΔG″ continued to decrease gradually in the removal stage of the step field. A comprehensive model based on magnetic dipolar and viscoelastic parameter models was proposed to explain the transient responses.
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