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Strain rate dependency on stress–strain relations of polypropylene

✍ Scribed by Akira Kobayashi; Nobuo Ohtani

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
857 KB
Volume
15
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

True constant strain rate tensile tests of polypropylene up to 2% initial strain were performed to investigate the strain rate dependency of the initial stress–strain gradient __d__σ/__d__ε with the aid of “slack grip.” The experimental results fairly agree with even the simplest mechanical model analysis with three parameters, showing the conspicuous strain rate dependency on the initial stress–strain gradient __d__σ/__d__ε. The limiting cases corresponding to zero strain rate and strain rate of infinite magnitude, both predicted by the analysis, were experimentally verified.

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