Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5190647 | Polymer | 2006 | 10 Pages |
Abstract
All tests showed similar deformation stages with a short region of visco-elastic behaviour followed by a rounded yield point. The von Mises equivalent yield stress for these tests showed a linear relationship with logarithmic strain rate, suggestive of an Eyring type thermally activated process. After yielding, all stress-strain curves showed a long plastic deformation regime, which in shear occurred at constant stress. In plane strain compression there was also only a very small increase in stress, in contrast to uniaxial tension where very significant strain hardening was observed at high strains, which is attributed to the onset of structural changes.
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Authors
J. Mohanraj, D.C. Barton, I.M. Ward, A. Dahoun, J.M. Hiver, C. G'Sell,