On a Thermodynamic Constitutive Theory and Its Application to Various Nonlinear Materials

  • R. A. Schapery
Part of the IUTAM Symposia book series (IUTAM)


The author’s thermodynamic constitutive theory for nonlinear viscoelastic behavior is extended to account for rate-independent plastic flow and for nonlinear creep with strong stress-dependence. It is then shown that the resulting stress-strain equations are consistent with mechanical behavior reported for several different materials under small and large strains; although principal concern here is with metals and polymeric solids, preliminary indications are that a variety of other materials, such as soils and biological tissue, can be characterized using the same basic equations. In this theory, history effects, with uniaxial or multiaxial loading, are taken into account by means of single integrals which are very similar to the Boltzmann type in linear viscoelastic theory.


Entropy Production Relaxation Modulus Relaxation Test Linear Viscoelasticity Thermodynamic Theory 
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Copyright information

© Springer-Verlag/Wien 1970

Authors and Affiliations

  • R. A. Schapery
    • 1
  1. 1.LafayetteUSA

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