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Proceedings Paper

Microstructure-based modeling of magneto-rheological elastomers
Author(s): Yi Han; Zihou Zhang; LeAnn E. Faidley; Wei Hong
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Paper Abstract

Filled with iron particles, polymers can be made responsive to magnetic fields. Specifically, the elastomers that change stiffness in response to a magnetic field are usually called magneto-rheological elastomers (MREs). Anisotropic MREs, in which the particles are aligned during curing and form chain-like structures, exhibit a more significant magneto-rheological (MR) effect, i.e. the field-induced stiffening. In this paper, we first develop a constitutive model for the nonlinear behavior of deformable solids under magnetic field. Based on the filler-substrate microstructure of MREs, we further implement the theory into a finite element method. The magneto-mechanical response of a representative unit cell of MRE is studied using the finite element method. The MR effect in both the shear modulus and the tensile modulus of an MRE is studied. In addition, we consider the viscoelasticity of the polymer matrix and study its effect on the properties of an MRE. Using the viscoelastic model for MRE, we also investigate the frequency dependence of the MR effect.

Paper Details

Date Published: 28 March 2012
PDF: 9 pages
Proc. SPIE 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012, 83421B (28 March 2012); doi: 10.1117/12.925492
Show Author Affiliations
Yi Han, Iowa State Univ. (United States)
Zihou Zhang, Iowa State Univ. (United States)
LeAnn E. Faidley, Wartburg College (United States)
Wei Hong, Iowa State Univ. (United States)

Published in SPIE Proceedings Vol. 8342:
Behavior and Mechanics of Multifunctional Materials and Composites 2012
Nakhiah C. Goulbourne; Zoubeida Ounaies, Editor(s)

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