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Thermo-visco-elasticity with rate-independent plasticityin isotropic materials undergoing thermal expansion*

Published online by Cambridge University Press:  11 October 2010

Sören Bartels
Affiliation:
Institut für Numerische Simulation, Rheinische Friedrich-Wilhelms-Universität Bonn, Wegelerstraße 6, 53115 Bonn, Germany. [email protected]
Tomáš Roubíček
Affiliation:
Mathematical Institute, Charles University, Sokolovská 83, 186 75 Praha 8, Czech Republic. Institute of Thermomechanics of the ASCR, Dolejškova 5, 182 00 Praha 8, Czech Republic.
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Abstract

We consider a viscoelastic solid in Kelvin-Voigt rheology exhibiting also plasticitywith hardening and coupled with heat-transfer through dissipative heat production by viscoplastic effectsand through thermal expansion and corresponding adiabatic effects. Numerical discretization of the thermodynamically consistent modelis proposed by implicit time discretization, suitable regularization, and finite elements in space. Fine a-priori estimates are derived, and convergence is proved by careful successive limit passage. Computational 3D simulations illustrate an implementation of the method as well as physical effects of residual stresses substantially depending on rate of heat treatment.

Type
Research Article
Copyright
© EDP Sciences, SMAI, 2010

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