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A mechanical model for creep, recovery and stress relaxation in polymeric materials

Fancey, Kevin S.

Authors

Abstract

A mechanical model is presented, in which viscoelastic response is described by the action of time-dependent latch elements. The model represents viscoelastic changes occurring through incremental jumps as opposed to continuous motion. This is supported by the observation that polymeric creep, recovery and stress relaxation can be correlated with stretched exponential functions, i.e. Weibull and Kohlrausch-Williams-Watts, since (i) the former is also used in reliability engineering to represent the failure of discrete elements and (ii) there is evidence of the latter being an approximation to the Eyring potential energy barrier relationship, which describes motion in terms of molecular jumps.

Journal Article Type Article
Publication Date 2005-09
Journal JOURNAL OF MATERIALS SCIENCE
Print ISSN 0022-2461
Electronic ISSN 1573-4803
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 40
Issue 18
Pages 4827-4831
Institution Citation Fancey, K. S. (2005). A mechanical model for creep, recovery and stress relaxation in polymeric materials. Journal of materials science, 40(18), (4827-4831). doi:10.1007/s10853-005-2020-x. ISSN 0022-2461
DOI https://doi.org/10.1007/s10853-005-2020-x
Keywords Polymer; Potential energy; Energy barrier; Polymeric material; Exponential function
Publisher URL https://link.springer.com/article/10.1007%2Fs10853-005-2020-x