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Temperature Dependence of Magneto-rheological Materials

Department of Mechanical Engineering, Composite and Intelligent Materials Laboratory, University of Nevada, Reno, USA

^* To whom correspondence should be addressed. E-mail: faramarz{at}unr.edu.

	Abstract

The properties of magneto-rheological (MR) materials are temperature dependent. Compared to MR fluids, MR greases (MRGs) are more sensitive to temperature due to their inherent behavior of carrier materials. In this study, MRGs are studied to examine the temperature effect on their yield stress and apparent viscosity. Experimental data are obtained for magnetic fields ranging from 0.14 T to 0.53 T and temperatures ranging from 10°C to 70°C. It is observed that temperature has a significant effect on the field-induced yield stress of MRGs. A new yield stress model, based on an extended Herschel–Bulkley constitutive relation, in which the shear yield stress is a function of magnetic field and temperature, is proposed. Excellent agreement between the theoretical results and experimental data is obtained.

First published on October 22, 2009, doi:10.1177/1045389X09351608

Journal of Intelligent Material Systems and Structures 2009;20:2215.

A more recent version of this article appeared on December 1, 2009


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