A physically motivated modification of the strain equivalence approach
Olsson, M and Ristinmaa, Matti LU
(2005)
In International Journal of Damage Mechanics
14(1).
p.25-50
- Abstract
- A phenomenological thermodynamic approach used for describing elasto-plasticity coupled with isotropic damage is considered. Using this approach it was recently shown by the authors that certain unwanted features exist in the plasticity-induced damage theories. This paper gives a suggestion on how to solve these issues. Based on physical arguments a simple modification of the postulate of strain equivalence is suggested. To show the effects of the modification, the von Mises plasticity model coupled with isotropic damage is used as a prototype model in the derivations. Both analytical considerations and simulations of a strain-controlled uniaxial model are performed. The results reveal that the modification of the postulate of strain... (More)
- A phenomenological thermodynamic approach used for describing elasto-plasticity coupled with isotropic damage is considered. Using this approach it was recently shown by the authors that certain unwanted features exist in the plasticity-induced damage theories. This paper gives a suggestion on how to solve these issues. Based on physical arguments a simple modification of the postulate of strain equivalence is suggested. To show the effects of the modification, the von Mises plasticity model coupled with isotropic damage is used as a prototype model in the derivations. Both analytical considerations and simulations of a strain-controlled uniaxial model are performed. The results reveal that the modification of the postulate of strain equivalence gives promising results. In contrast to the postulates of strain equivalence and (complementary) energy equivalence, the present formulation predicts the elastic strain to vanish when failure takes place. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/255302
- author
- Olsson, M
and Ristinmaa, Matti
LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- strain equivalence, elasto-plasticity, plasticity-induced damage, isotropic damage, damage evolution, thermodynamics
- in
- International Journal of Damage Mechanics
- volume
- 14
- issue
- 1
- pages
- 25 - 50
- publisher
- SAGE Publications
- external identifiers
-
- wos:000226367500002
- scopus:12744280542
- ISSN
- 1056-7895
- DOI
- 10.1177/1056789505044286
- language
- English
- LU publication?
- yes
- id
- 4976fb54-1abd-4365-ace5-a292192a0d12 (old id 255302)
- date added to LUP
- 2016-04-01 12:02:23
- date last changed
- 2022-04-21 01:30:57
@article{4976fb54-1abd-4365-ace5-a292192a0d12,
abstract = {{A phenomenological thermodynamic approach used for describing elasto-plasticity coupled with isotropic damage is considered. Using this approach it was recently shown by the authors that certain unwanted features exist in the plasticity-induced damage theories. This paper gives a suggestion on how to solve these issues. Based on physical arguments a simple modification of the postulate of strain equivalence is suggested. To show the effects of the modification, the von Mises plasticity model coupled with isotropic damage is used as a prototype model in the derivations. Both analytical considerations and simulations of a strain-controlled uniaxial model are performed. The results reveal that the modification of the postulate of strain equivalence gives promising results. In contrast to the postulates of strain equivalence and (complementary) energy equivalence, the present formulation predicts the elastic strain to vanish when failure takes place.}},
author = {{Olsson, M and Ristinmaa, Matti}},
issn = {{1056-7895}},
keywords = {{strain equivalence; elasto-plasticity; plasticity-induced damage; isotropic damage; damage evolution; thermodynamics}},
language = {{eng}},
number = {{1}},
pages = {{25--50}},
publisher = {{SAGE Publications}},
series = {{International Journal of Damage Mechanics}},
title = {{A physically motivated modification of the strain equivalence approach}},
url = {{http://dx.doi.org/10.1177/1056789505044286}},
doi = {{10.1177/1056789505044286}},
volume = {{14}},
year = {{2005}},
}