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On the thermodynamics of stress rate in the evolution of back stress in viscoplasticity

Author
Chaboche, J.-L.
Published
JAN 1, 1991.
Physical Description
1 electronic document
Additional Creators
Walker, K. P. and Freed, Alan D.
Online Version

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Summary
A thermodynamic foundation using the concept of internal state variables is presented for the kinematic description of a viscoplastic material. Three different evolution equations for the back stress are considered. The first is that of classical, nonlinear, kinematic hardening. The other two include a contribution that is linear in stress rate. Choosing an appropriate change in variables can remove this stress rate dependence. As a result, one of these two models is shown to be equivalent to the classical, kinematic hardening model; while the other is a new model, one which seems to have favorable characteristics for representing ratchetting behavior. All three models are thermodynamically admissible.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19910010163.
Accession ID: 91N19476.
E-6071.
NASA-TM-103794.
NAS 1.15:103794.
International Symposium on Plasticity; 12-16 Aug. 1991; Grenoble; France.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15682126