Elastic Properties of Magnetorheological Elastomers in a Heterogeneous Uniaxial Magnetic Field
Open Access
- 6 October 2018
- journal article
- research article
- Published by MDPI AG in International Journal of Molecular Sciences
- Vol. 19 (10), 3045
- https://doi.org/10.3390/ijms19103045
Abstract
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%.This publication has 18 references indexed in Scilit:
- Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and ApplicationsAdvanced Engineering Materials, 2014
- Field-stiffening effect of magneto-rheological elastomersInternational Journal of Solids and Structures, 2013
- Stability of anisotropic magnetorheological elastomers in finite deformations: A micromechanical approachJournal of the Mechanics and Physics of Solids, 2013
- Experiments and modeling of iron-particle-filled magnetorheological elastomersJournal of the Mechanics and Physics of Solids, 2012
- Magnetic polyurethane elastomers with wide range modulation of elasticityPolymer Chemistry, 2011
- Effect of a homogeneous magnetic field on the viscoelastic behavior of magnetic elastomersPolymer, 2007
- Magnetic field sensitive functional elastomers with tuneable elastic modulusPolymer, 2005
- Smart composites with controlled anisotropyPolymer, 2005
- On the magneto-elastic properties of elastomer–ferromagnet compositesJournal of the Mechanics and Physics of Solids, 2001
- A model of the behaviour of magnetorheological materialsSmart Materials and Structures, 1996