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The temperature dependence of non-linear creep and recovery in oriented polypropylene

Authors
Journal
Journal of the Mechanics and Physics of Solids
0022-5096
Publisher
Elsevier
Publication Date
Volume
19
Issue
4
Identifiers
DOI: 10.1016/0022-5096(71)90026-3

Abstract

Abstract This paper describes creep, recovery and load superposition experiments on an oriented polypropylene monofilament in the temperature range 28–60 C. Although the monofilament exhibited non-linear behaviour, the results for different temperatures were found to be related by simple time/temperature equivalence. The multiple integral representation for the non-linear viscoelastic behaviour is considered, and it is found that the experimental results can be represented, with reasonable accuracy, by first-, second- and third-order stress terms. It is shown that each of the kernels in this representation is shifted by the same factor with change in temperature.

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