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Modeling and Verification of Relaxation Behavior for Magnetorheological Elastomers with Applied Magnetic Field

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Abstract:

In this paper, on the basis of the viscoelastic fractional derivative model, Mittag-Leffler function is applied to deduce the expression of stress relaxation modulus for magnetorheological elastomers according to its form and main properties. Furthermore, the relaxation modulus for polyurethane rubber matrix cured magnetorheological elastomers at different applied magnetic fields and shear strains is tested by rheometer. The results indicate that magnetorheological elastomers exhibit obvious relaxation behavior and the magnetic field strength and shear strain exert significant influence on the relaxation behavior: the relaxation modulus of magnetorheological elastomers increases with the magnetic field strength but decreases with the shear strain. Besides, the model agrees well with the experimental data which indicates that the model is suitable for characterization of relaxation behavior for magnetorheological elastomers.

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Periodical:

Key Engineering Materials (Volume 730)

Pages:

527-532

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.730.527

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Online since:

February 2017

Authors:

Guo Jun Yu, Xiao Guo Lin*, Fei Guo

Keywords:

Applied Magnetic Field, Magnetorheological Elastomers, Mittag-Leffler Function, Relaxation Modulus

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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