Abstract
Magnetorheological (MR) gels belong to a group of smart materials whose attributes can be altered when it is exposed to an external magnetic field. In this paper, the investigation on the creep behavior of MR gels under constant stress is performed. MR gels are prepared by dispersing carbonyl iron (CI) microparticles of different volume percentages (10%, 20%, 30%) in a polymer gel. Using a free decay test apparatus built in-house, the effect of the magnetic field on the creep behavior of MR gels with various volume percentages of CI particles is studied, and the results are compared. From the results, a clear increasing trend is noticed in the creep resistance of the magnetic gel with the increase in the volume percentage of the particles under the same magnitudes of the magnetic field. The obtained experimental creep data are fitted suitably using a three-parameter model.
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