Strain rate dependency on stress–strain relations of polypropylene
Article first published online: 9 MAR 2003
Copyright © 1971 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 15, Issue 4, pages 975–985, April 1971
How to Cite
Kobayashi, A. and Ohtani, N. (1971), Strain rate dependency on stress–strain relations of polypropylene. J. Appl. Polym. Sci., 15: 975–985. doi: 10.1002/app.1971.070150416
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 26 OCT 1970
- Manuscript Received: 28 APR 1970
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 dσ/dε 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 dσ/dε. The limiting cases corresponding to zero strain rate and strain rate of infinite magnitude, both predicted by the analysis, were experimentally verified.