Finite element study on magnetomechanical properties of magnetorheological elastomer used in advanced mechanical systems.

Magnetorheological Elastomers (MREs) constitutes a group of materials referred to as ‘smart’ materials. These materials exhibit field-dependent material property which include change in damping and stiffness properties of the material when subjected to an external magnetic field. This paper presents a simulation study of magnetomechanical and thermal properties for a MRE used as a semi-active automotive suspension bushing. Such suspension bushings isolate passengers from the undesirable effects of the surface over which the vehicle is being driven on. It also enhances handling and driving comfort of the driver. The performance of semi-active suspension bushing is highly dependent on the magnetic properties of the MRE. Therefore, electromagnetic simulation using finite element analysis software is used to design and optimize on the MRE suspension bushing’s response to magnetic field. From the finite element analysis, the magnetic flux density developed within the MRE is observed to depend on the permeability, thickness and magnetic shielding of the MRE.