Influence of mechanical properties and loading conditions on the recovery of shape memory polymers

Rui Xiao, Xiang Chen, Thao D. Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work presented a parameter study to investigate the influence of material properties and loading conditions on the recovery performance of amorphous shape memory polymers using a recently developed thermoviscoelastic model. The model incorporated the time-dependent effects of both structural relaxation - using a nonlinear Adam-Gibbs model-and viscoelasticity. The model can predict well the unconstrained strain recovery response and stress evolution during constrained recovery process. The materials properties and the loading parameters, including the cooling rate, the annealing time, and the heating rate, were varied one by one to compare the effects on the start and end temperatures and recovery time of the unconstrained recovery response and on the stress hysteresis of the constrained recovery response. The results confirmed experimental observations that unconstrained strain recovery response was mostly influenced by viscoelasticity, while the constrained recovery response resulted from the interaction of many different mechanisms, including structural and stress relaxation, thermal expansion, the modulus of rubbery and glass state. The results also showed that the cooling and heating rates had the largest influence on both recovery responses.

Original languageEnglish (US)
Title of host publicationMechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics
PublisherSpringer New York LLC
Pages113-118
Number of pages6
ISBN (Print)9781461402121
DOIs
StatePublished - 2011
Externally publishedYes
Event2011 SEM Annual Conference on Experimental and Applied Mechanics - Uncasville, CT, United States
Duration: Jun 13 2011Jun 16 2011

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume3
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2011 SEM Annual Conference on Experimental and Applied Mechanics
Country/TerritoryUnited States
CityUncasville, CT
Period6/13/116/16/11

ASJC Scopus subject areas

  • General Engineering
  • Computational Mechanics
  • Mechanical Engineering

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