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

Fancey, Kevin S.

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.

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. https://doi.org/10.1007/s10853-005-2020-x

• Journal Article Type: Article
• Online Publication Date: Jul 8, 2005
• Publication Date: 2005-09
• Journal: JOURNAL OF MATERIALS SCIENCE
• Print ISSN: 0022-2461
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 40
• Issue: 18
• Pages: 4827-4831
• DOI: https://doi.org/10.1007/s10853-005-2020-x
• Keywords: Polymer; Potential energy; Energy barrier; Polymeric material; Exponential function
• Public URL: https://hull-repository.worktribe.com/output/387207
• Publisher URL: https://link.springer.com/article/10.1007%2Fs10853-005-2020-x