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Advances in Materials Science and Engineering
Volume 2013, Article ID 307207, 6 pages
Research Article

Analysis and Testing of MR Shear Transmission Driven by SMA Spring

1College of Mechanical Engineering, Chongqing University of Technology, Chongqing 400050, China
2College of Vehicle Engineering, Chongqing University of Technology, Chongqing 400050, China

Received 11 July 2013; Accepted 27 August 2013

Academic Editor: Xing Chen

Copyright © 2013 Jin Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A transmission method of magnetorheological (MR) fluid in cylindrical-type driven by shape memory alloy (SMA) spring with the thermal effect was proposed. The torque can change rapidly with temperature. Based on the thermal effect of SMA, the expression for displacement of SMA spring was established. The rheological property of MR fluid under the magnetic fields was described by Bingham model. Based on momentum equation, the shear flow of MR fluid between two cylinders was analyzed and the expressions of flow velocity and torque have been obtained. The experimental results show the output displacement of SMA spring and the transmit torque of MR fluid is directly proportional to the temperature and the applied magnetic field, respectively.