Title: Behaviour of MR fluids in squeeze mode

Authors: S.L. Vieira, C. Ciocanel, P. Kulkarni, A. Agrawal, N. Naganathan

Addresses: Mechanical, Industrial and Manufacturing Engineering Department, University of Toledo, Nitschke Hall 4005, 2801 W. Bancroft Street, Toledo, OH 43606, USA. Mechanical, Industrial and Manufacturing Engineering Department, University of Toledo, Nitschke Hall 4005, 2801 W. Bancroft Street, Toledo, OH 43606, USA. Mechanical, Industrial and Manufacturing Engineering Department, University of Toledo, Nitschke Hall 4005, 2801 W. Bancroft Street, Toledo, OH 43606, USA. Mechanical, Industrial and Manufacturing Engineering Department, University of Toledo, Nitschke Hall 4005, 2801 W. Bancroft Street, Toledo, OH 43606, USA. Mechanical, Industrial and Manufacturing Engineering Department, University of Toledo, Nitschke Hall 4005, 2801 W. Bancroft Street, Toledo, OH 43606, USA

Abstract: The behaviour of three types of magnetorheological fluids under squeeze mode was investigated. A special device was designed and fabricated to perform these experiments which were carried out on an Instron Multiaxial Testing Machine. The hysteresis loops of the MR fluids were studied for different intensities of magnetic field, frequency, strain amplitude and angular amplitude. The results showed that the damping force and the area of the hysteresis loop of MR fluids increase with the magnetic field (or electric current i) and displacement amplitude (x₀). Changes to the frequency (f) produced different behaviour of the various MR fluids. The peak compressive force was found to increase with the increase in number of cycles (N).

Keywords: magnetorheological fluids; smart materials; damper; squeeze mode; mechanical tests.

DOI: 10.1504/IJVD.2003.003566

International Journal of Vehicle Design, 2003 Vol.33 No.1/2/3, pp.36 - 49

Published online: 19 Sep 2003 *

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