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Advances in Materials Science and Engineering
Volume 2015, Article ID 159256, 8 pages
http://dx.doi.org/10.1155/2015/159256
Research Article

Stress-Softening Formulae of Polymer Bearings

Department of Applied Mathematics and Science, Khalifa University, P.O. Box 127788, Abu Dhabi, UAE

Received 1 July 2015; Accepted 28 September 2015

Academic Editor: Luigi Nicolais

Copyright © 2015 M. H. B. M. Shariff 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.

Abstract

The motivation for this work was the absence of closed form solutions that can reasonably describe the axial deformation behaviour of stress-softening polymer bearings. In this paper, new closed form solutions that exhibit Mullins phenomenon are developed. We show that the apparent Young modulus depends on the shape factor and the minimal infinitesimal strain. We furthermore found that, in a nonlinear deformation, the shape factor plays an important role in stress softening. The solutions are design friendly and are consistent with expected results.