Abstract
The present study aims to investigate the magnetic characteristics of a magnetorheological elastomer (MRE) bushing for design optimization in the high-frequency dynamic test. The proposed design consists of MRE bushing covered cylindrically with the coil bobbin for electromagnetic coil winding. These components are covered with the testing jig attached to the testing machine. MRE experimental studies often show uncertainty in evaluating the magnetic distribution across the entire testing structure specifically in MRE specimens. A finite element model for MRE bushing is designed to evaluate the magnetic distribution of the device under several factors that can affect the magnetic distribution. The results of the model are optimized to obtain high magnetic flux density in the MRE area. The magnetic intensity (H) as a function of magnetic flux density (B) was also determined through the B-H relation curve. It was proved that the magnetic distribution is affected significantly by factors such as material components and current applied (Ampere) to the MRE bushing. The optimum MRE bushing design with 1 Ampere can reach the highest magnetic flux density of 960 mT. Therefore, an optimum magnetic distribution condition for MRE bushing can be realized in the real experimental study.
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