Magnetic induction measurements and identification of the permeability of magneto-rheological elastomers using finite element simulations

Schubert, G. and Harrison, P. (2016) Magnetic induction measurements and identification of the permeability of magneto-rheological elastomers using finite element simulations. Journal of Magnetism and Magnetic Materials, 404, pp. 205-214. (doi: 10.1016/j.jmmm.2015.12.003)

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The isotropic and anisotropic magnetic permeability of Magneto-Rheological Elastomers (MREs) are identified using a simple inverse modelling approach. This involves measuring the magnetic flux density and attractive force occurring between magnets, when MRE specimens are placed in between the magnets. Tests were conducted using isotropic MREs with 10% to 40% and for anisotropic MREs with 10% to 30%, particle volume concentration. Magnetic permeabilities were then identified through inverse modelling, by simulating the system using commercially available multi-physics finite element software. As expected, the effective permeability of isotropic MREs was found to be scalar-valued; increasing with increasing particle volume concentration (from about 1.6 at 10% to 3.7 at 30% particle volume concentration). The magnetic permeability of transversely isotropic MRE was itself found to be transversely isotropic, with permeabilities in the direction of particle chain alignment from 1.6 at 10% to 4.45 at 30%, which is up to 1.07 to 1.25 times higher than in the transverse directions. Results of this investigation are demonstrated to show good agreement with those reported in the literature.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Harrison, Dr Philip
Authors: Schubert, G., and Harrison, P.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Magnetism and Magnetic Materials
ISSN (Online):1873-4766
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Journal of Magnetism and Magnetic Materials 404:205-214
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
599831Microstructure-Based Multi-Physics Characterisation and Modelling of Magnetorheological ElastomersPhilip HarrisonEngineering & Physical Sciences Research Council (EPSRC)EP/H016619/3ENG - ENGINEERING SYSTEMS POWER & ENERGY