Abstract

A reduced variable, linear thermoelastic constitutive equation for rubber at small strains is obtained from classical linear thermoelasticity and empirical observations about the stress-temperature behaviour of real elastomers at fixed strain. In contrast to the statistical theory of rubber elasticity, volume changes are recognized explicitly in the three constant equation of state. This formulation leads to self-consistent, quantitative predictions of the thermoelastic inversion and internal energy changes with deformation which support the basic tenets of the statistical theory.

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