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Viscoelastic properties of MR elastomers under harmonic loading

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Abstract

This paper presents both experimental and modeling studies of viscoelastic properties of MR elastomers under harmonic loadings. Magnetorheological elastomer (MRE) samples were fabricated by mixing carbonyl iron power, silicone oil, and silicone rubber and cured under a magnetic field. Its steady-state and dynamic properties were measured by using a parallel-plate rheometer. Various sinusoidal loadings, with different strain amplitude and frequencies, were applied to study the stress responses. The stress–strain results demonstrated that MR elastomers behave as linear visocoelastic properties. Microstructures of MRE samples were observed with a scanning electron microscope. A four-parameter linear viscoelatic model was proposed to predict MRE performances. The four parameters under various working conditions (magnetic field, strain amplitude, and frequency) were identified with the MATLAB optimization algorithm. The comparisons between the experimental results and the model predictions demonstrate that the four-parameter viscoelastic model can predict MRE performances very well. In addition, dynamic properties of MRE performances were alternatively represented with equivalent stiffness and damping coefficients.

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Correspondence to W. H. Li.

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Li, W.H., Zhou, Y. & Tian, T.F. Viscoelastic properties of MR elastomers under harmonic loading. Rheol Acta 49, 733–740 (2010). https://doi.org/10.1007/s00397-010-0446-9

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  • DOI: https://doi.org/10.1007/s00397-010-0446-9

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