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A thermomechanical constitutive model for an epoxy based shape memory polymer and its parameter identifications

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Abstract

This paper presents a three-dimensional (3D) finite deformation thermomechanical model to study the glass transition and shape memory behaviors of an epoxy based shape memory polymer (SMP) (Veriflex E) and a systematic material parameter identification scheme from a set of experiments. The model was described by viscoelastic elements placed in parallel to represent different active relaxation mechanisms around glass transition temperature in the polymer. A set of standard material tests was proposed and conducted to identify the model parameter values, which consequently enable the model to reproduce the experimentally observed shape memory (SM) behaviors. The parameter identification procedure proposed in this paper can be used as an effective tool to assist the construction and application of such 3D multi-branch model for general SMP materials.

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Notes

  1. The anisotropy in polymer thermal expansion could be accounted for by using additional thermal expansion components in the model.

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Acknowledgements

H.J.Q. acknowledges the support through AFRL summer faculty fellowship program (contract FA8650-07-D-5800).

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309, USA

    Kai Yu & H. Jerry Qi

  2. Air Force Research Laboratory, Materials and Manufacturing Directorate, WPAFB, Dayton, OH, 45433, USA

    Amber J. W. McClung, Gyaneshwar P. Tandon & Jeffrey W. Baur

  3. National Research Council Research Associate, AFRL, Wright-Patterson AFB, Dayton, OH, 45433, USA

    Amber J. W. McClung

  4. University of Dayton Research Ins., Dayton, OH, USA

    Gyaneshwar P. Tandon

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  1. Kai Yu
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  2. Amber J. W. McClung
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Correspondence to Jeffrey W. Baur or H. Jerry Qi.

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Yu, K., McClung, A.J.W., Tandon, G.P. et al. A thermomechanical constitutive model for an epoxy based shape memory polymer and its parameter identifications. Mech Time-Depend Mater 18, 453–474 (2014). https://doi.org/10.1007/s11043-014-9237-5

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