Abstract
Magneto-Rheological fluid (MRF) is known as one of highly functional materials, and apparent viscosity of MRF can be varied in accordance with the applied magnetic field strength. But the sedimentation of the magnetic particles of MRF will result in unsteady dynamic behaviors of the MR devices. In order to reduce the sedimentation of the magnetic particles in MRF, Magneto-Rheological grease (MRG) was developed. MRG can reduce the sedimentation of magnetic particles, and its rheological property can also be varied in accordance with the applied magnetic field strength. In this paper, the properties of MRG were examined and MRG was adapted to a cylindrical damper. The typical properties of MR damper using MRG were studied experimentally.
