Rate-Dependent Hyperplasticity with Internal Functions
Publication: Journal of Engineering Mechanics
Volume 129, Issue 3
Abstract
This paper extends previous work reported by Houlsby and Puzrin in 2001 in which a thermomechanical framework was set out for the derivation of rate-dependent plasticity theory with internal variables. A key feature of the earlier formalism is that the entire constitutive response is determined by the knowledge of two scalar potential functions. In this paper, we extend the concept of internal variables to that of internal functions, which represent infinite numbers of internal variables. In this case, the thermodynamic functions are replaced by functionals. This work also extends previous work on rate-independent materials reported by Puzrin and Houlsby in 2001a. The principal advantages of this development are that it can provide realistic modeling of kinematic hardening effects and smooth transitions between elastic and elastic-viscoplastic behavior. The ability of a model developed within this new framework to capture realistically various aspects of rate dependent undrained triaxial behavior of saturated clays has been verified against experimental data.
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References
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 129 • Issue 3 • March 2003
Pages: 252 - 263
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Nov 6, 2001
Accepted: Aug 23, 2002
Published online: Feb 14, 2003
Published in print: Mar 2003
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