Thermomechanical theory of materials undergoing large elastic and viscoplastic deformation (AWBA development program)

Technical Report · Fri Oct 31 23:00:00 EST 1980

DOI:https://doi.org/10.2172/6808737· OSTI ID:6808737

Martin, S. E.; Newman, J. B.

A thermomechanical theory of large deformation elastic-inelastic material behavior is developed which is based on a multiplicative decomposition of the strain. Very general assumptions are made for the elastic and inelastic constitutive relations and effects such as thermally-activated creep, fast-neutron-flux-induced creep and growth, annealing, and strain recovery are compatible with the theory. Reduced forms of the constitutive equations are derived by use of the second law of thermodynamics in the form of the Clausius-Duhem inequality. Observer invariant equations are derived by use of an invariance principle which is a generalization of the principle of material frame indifference.

• Research Organization: Bettis Atomic Power Lab., West Mifflin, PA (USA)
• DOE Contract Number: AC11-76PN00014
• OSTI ID: 6808737
• Report Number(s): WAPD-TM-1472
• Country of Publication: United States
• Language: English

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