Strain rate- and temperature-dependent tensile properties of an epoxy-based, thermosetting, shape memory polymer (Veriflex-E)

Amber J.W. McClung, Gyaneshwar P. Tandon, Jeffery W. Baur

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the inelastic deformation behavior of an epoxy-based, thermally triggered shape memory polymer resin, known as Veriflex-E, was investigated. The experimental program was designed to explore the influence of strain rate on monotonic loading at various temperatures which is needed to establish the design space of SMPs in load bearing applications. Thermally actuated shape memory polymers can be thought of as having two phases separated by the glass transition temperature (Tg). At temperatures below the Tg, Veriflex-E exhibits a high elastic modulus and positive, non-linear strain rate sensitivity in monotonic loading. The Poisson's ratio at room temperature is independent of the strain rate, but dependent upon the strain magnitude. As the temperature is increased, the strain rate sensitivity in monotonic loading decreases. Well above the Tg, the elastic modulus drops by several orders of magnitude. In this high temperature region, the material achieves strain levels well above 100% and Poisson's ratio is constant at 0.5 regardless of strain rate or strain magnitude.

Original languageEnglish (US)
Pages (from-to)205-221
Number of pages17
JournalMechanics of Time-Dependent Materials
Volume16
Issue number2
DOIs
StatePublished - May 2012
Externally publishedYes

Keywords

  • Digital image correlation
  • Poisson's ratio
  • Shape memory polymer
  • Strain rate dependence
  • Temperature dependence

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanical Engineering

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