Abstract
Magneto-Rheological Grease (MR Grease) is one of functional fluids whose yield shear stress can be controlled reversibly by the applied magnetic field strength. Grease is known as lubricant widely used in mechanical components. It is composed of base oil and thickener which has 3-dimensional structure. Micron-size iron particles are dispersed in grease, and the thickener is expected to prevent iron particles from settling out caused by density difference of compositions. In this study, a model of MR Grease clutch was constructed and its performance was investigated as an application study of MR Grease. The effect of centrifugal force to MR Grease was also studied.
