Magnetic field-dependent inductance properties based on magnetorheological elastomer

Abstract

Magnetorheological (MR) materials are a class of smart material, whose the mechanical/rheological state can be controlled under a magnetic field. Magnetorheological materials are typically fluids, gels, or elastomers. In this study, anisotropic and isotropic magneto-rheological elastomer (MRE) samples were fabricated using a silicone rubber matrix with carbonyl iron particles as filler particles. The magnetic field-dependent inductance properties of these samples were studied using inductors specially designed for the analysis. The effect of the filler particle content, fabrication conditions, and inductance properties were characterized using a self-built system in both constant and transient magnetic fields. These factors show a significant effect on the inductance properties of the MRE inductor under an applied magnetic field. The anisotropic MRE inductor was more sensitive than the inductor based on an isotropic MRE. Owing to the presence of a constant magnetic field, the inductance value of the MRE inductor decreased with an increase in the external magnetic field. An attempt in elucidation of the mechanism is reported here. This study may enable the MRE to be widely used in practical applications such as monitoring magnetic field or detecting the filler particle content inside MR materials.

Keywords

magnetorheological elastomer / magnetorheological elastomer (MRE) inductor / inductance / constant magnetic field / transient magnetic field

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