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Thermodynamic Formulation of Plastic Work Hardening Materials

Ristinmaa, Matti LU (1999) In Journal of Engineering Mechanics 125(152). p.152-155
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Thermodynamics, elasto-plasticity, nonassociated plasticity
in
Journal of Engineering Mechanics
volume
125
issue
152
pages
152 - 155
publisher
American Society of Civil Engineers (ASCE)
external identifiers
  • scopus:0033075359
ISSN
1943-7889
DOI
10.1061/(ASCE)0733-9399(1999)125:2(152)
language
English
LU publication?
yes
id
55614419-da69-4a5d-aac2-7077d9ca6f94 (old id 2223706)
date added to LUP
2011-12-06 13:43:18
date last changed
2017-01-01 07:38:42
@article{55614419-da69-4a5d-aac2-7077d9ca6f94,
  abstract     = {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.},
  author       = {Ristinmaa, Matti},
  issn         = {1943-7889},
  keyword      = {Thermodynamics,elasto-plasticity,nonassociated plasticity},
  language     = {eng},
  number       = {152},
  pages        = {152--155},
  publisher    = {American Society of Civil Engineers (ASCE)},
  series       = {Journal of Engineering Mechanics},
  title        = {Thermodynamic Formulation of Plastic Work Hardening Materials},
  url          = {http://dx.doi.org/10.1061/(ASCE)0733-9399(1999)125:2(152)},
  volume       = {125},
  year         = {1999},
}