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RESEARCH PAPERS

Rotational Sliding of Rubber: Second-Order Stresses, Seizure, and Buckling

[+] Author and Article Information
A. N. Gent, R. L. Henry

Institute of Polymer Science, The University of Akron, Akron, Ohio 44325

J. Appl. Mech 49(2), 336-340 (Jun 01, 1982) (5 pages) doi:10.1115/1.3162090 History: Received November 01, 1981; Revised January 01, 1982; Online July 21, 2009

Abstract

Measurements are described of the frictional torque required to make a flat-ended rubber cylinder, bonded at one end to a flat metal plate, rotate about the cylinder axis when the other end is pressed against a flat Plexiglas surface. The contact pressure is found to increase on rotation, by an amount proportional to the square of the torsional deformation of the cylinder. The frictional torque then tends toward extremely large values (seizure) when the imposed compression approaches a critical level of about 20 percent, as predicted by theory. The rubber cylinder then transforms to a nonuniform state of deformation in which parts of the curved surfaces are drawn into contact with the Plexiglas surface. Sliding continues in this torsionally buckled state, at relatively low pressures and torques.

Copyright © 1982 by ASME
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