Temperature dependence quasi-static measurements on a magnetorheological fluid having plate-like iron particles as dispersed phase

Abstract

In this work, the field-dependent rheological properties of the magnetorheological fluid system, featuring plate-like iron particles, at different magnetic fields in quasi-static mode are investigated using MCR 301 magnetorheometer at ambient temperature. At an intermediate field strength, static yield stress exhibits H^1.5 dependency, eventually becoming field independent at higher field. Later on, the temperature-dependent properties are analysed at the different magnetic field intensities. Observational data are obtained from magnetic field ranging from 0.0 to 1.1 T and in the temperature range 30°C−120°C. It is noted that at low field strength, the static yield stress increases initially with temperature and decreases with further increase in temperature. A yield stress model is suggested based on the average normalized sensitivity and magnetic field to describe the measured variation in the magnetorheological fluid response at higher temperature. This information will be useful for predicting thermal sensitivity of device performance.