Thermodynamic Formulation of Plastic Work Hardening Materials
Author
Summary, in English
Thermodynamic formulation of elastoplastic or viscoplastic models using the internal variable approach currently does not include models using the plastic work as a hardening variable. This means that many realistic material models do not fit into the current thermodynamic framework. An approach to extend the thermodynamic framework to include models where plastic work is used as a hardening variable is considered. This approach can even be extended to viscoplasticity where the change of the quasistatic yield function is controlled by the plastic work. As an application of the approach, the Lade-Kim model is considered. This nonassociated plasticity model uses plastic work as a hardening variable, and it is capable of predicting the behavior of frictional materials, in particular soils. It is shown that the model can be described in a general thermodynamic framework and that it is well defined in a thermodynamic sense.
Department/s
Publishing year
1999
Language
English
Pages
152-155
Publication/Series
Journal of Engineering Mechanics
Volume
125
Issue
152
Links
Document type
Journal article
Publisher
American Society of Civil Engineers (ASCE)
Topic
- Mechanical Engineering
Keywords
- Thermodynamics
- elasto-plasticity
- nonassociated plasticity
Status
Published
ISBN/ISSN/Other
- ISSN: 1943-7889