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Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field

Magnetorheological elastomers (MREs) are stimulus-responsive soft materials that consist of polymeric matrices and magnetic particles. In this study, large-strain response of MREs with 5 vol % of carbonyl iron (CI) particles is experimentally characterized for two different conditions: (1) shear def...

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Detalles Bibliográficos
Autores principales: Kikuchi, Takehito, Kobayashi, Yusuke, Kawai, Mika, Mitsumata, Tetsu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6213494/
https://www.ncbi.nlm.nih.gov/pubmed/30301215
http://dx.doi.org/10.3390/ijms19103045
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author Kikuchi, Takehito
Kobayashi, Yusuke
Kawai, Mika
Mitsumata, Tetsu
author_facet Kikuchi, Takehito
Kobayashi, Yusuke
Kawai, Mika
Mitsumata, Tetsu
author_sort Kikuchi, Takehito
collection PubMed
description Magnetorheological elastomers (MREs) are stimulus-responsive soft materials that consist of polymeric matrices and magnetic particles. In this study, large-strain response of MREs with 5 vol % of carbonyl iron (CI) particles is experimentally characterized for two different conditions: (1) shear deformation in a uniform magnetic field; and (2), compression in a heterogeneous uniaxial magnetic field. For condition (1), dynamic viscoelastic measurements were performed using a rheometer with a rotor disc and an electric magnet that generated a uniform magnetic field on disc-like material samples. For condition (2), on the other hand, three permanent magnets with different surface flux densities were used to generate a heterogeneous uniaxial magnetic field under cylindrical material samples. The experimental results were mathematically modeled, and the relationship between them was investigated. We also used finite-element method (FEM) software to estimate the uniaxial distributions of the magnetic field in the analyzed MREs for condition (2), and developed mathematical models to describe these phenomena. By using these practicable techniques, we established a simple macroscale model of the elastic properties of MREs under simple compression. We estimated the elastic properties of MREs in the small-strain regime (neo–Hookean model) and in the large-strain regime (Mooney–Rivlin model). The small-strain model explains the experimental results for strains under 5%. On the other hand, the large-strain model explains the experimental results for strains above 10%.
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spelling pubmed-62134942018-11-14 Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field Kikuchi, Takehito Kobayashi, Yusuke Kawai, Mika Mitsumata, Tetsu Int J Mol Sci Communication Magnetorheological elastomers (MREs) are stimulus-responsive soft materials that consist of polymeric matrices and magnetic particles. In this study, large-strain response of MREs with 5 vol % of carbonyl iron (CI) particles is experimentally characterized for two different conditions: (1) shear deformation in a uniform magnetic field; and (2), compression in a heterogeneous uniaxial magnetic field. For condition (1), dynamic viscoelastic measurements were performed using a rheometer with a rotor disc and an electric magnet that generated a uniform magnetic field on disc-like material samples. For condition (2), on the other hand, three permanent magnets with different surface flux densities were used to generate a heterogeneous uniaxial magnetic field under cylindrical material samples. The experimental results were mathematically modeled, and the relationship between them was investigated. We also used finite-element method (FEM) software to estimate the uniaxial distributions of the magnetic field in the analyzed MREs for condition (2), and developed mathematical models to describe these phenomena. By using these practicable techniques, we established a simple macroscale model of the elastic properties of MREs under simple compression. We estimated the elastic properties of MREs in the small-strain regime (neo–Hookean model) and in the large-strain regime (Mooney–Rivlin model). The small-strain model explains the experimental results for strains under 5%. On the other hand, the large-strain model explains the experimental results for strains above 10%. MDPI 2018-10-06 /pmc/articles/PMC6213494/ /pubmed/30301215 http://dx.doi.org/10.3390/ijms19103045 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Kikuchi, Takehito
Kobayashi, Yusuke
Kawai, Mika
Mitsumata, Tetsu
Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
title Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
title_full Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
title_fullStr Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
title_full_unstemmed Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
title_short Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
title_sort elastic properties of magnetorheological elastomers in a heterogeneous uniaxial magnetic field
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6213494/
https://www.ncbi.nlm.nih.gov/pubmed/30301215
http://dx.doi.org/10.3390/ijms19103045
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