An approach to the adaptive finite element analysis in associated and non-associated plasticity considering localization phenomena
In an adaptive finite element approach elastoplastic problems with associated and non-associated flow rules are investigated. The first part of the paper deals with the underlying numerical formulation for a classical continuum model and a hierarchical h-adaptive mesh refinement strategy. Essential...
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Published in | Computer methods in applied mechanics and engineering Vol. 176; no. 1; pp. 187 - 202 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
06.07.1999
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Abstract | In an adaptive finite element approach elastoplastic problems with associated and non-associated flow rules are investigated. The first part of the paper deals with the underlying numerical formulation for a classical continuum model and a hierarchical
h-adaptive mesh refinement strategy. Essential ingredients of the adaptive process are a suitable error indicator and transfer operations for the mapping of history-dependent state variables between different meshes. These are imbedded in a nonlinear incremental finite element procedure. For non-associated plasticity a standard continuum approach may lead to an ill-posed problem. Therefore, in the second part a generalization in the framework of a Cosserat theory is considered. The underlying equations possess a similar structure, and the adaptive finite element formulation can be extended in a straightforward manner. Numerical examples demonstrate the general applicability of the approach to elastoplastic problems including associated as well as non-associated plasticity. They show the superior behaviour of the Cosserat formulation in the case of localization phenomena also for non-associated plasticity. |
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AbstractList | In an adaptive finite element approach elastoplastic problems with associated and non-associated flow rules are investigated. The first part of the paper deals with the underlying numerical formulation for a classical continuum model and a hierarchical h-adaptive mesh refinement strategy. Essential ingredients of the adaptive process are a suitable error indicator and transfer operations for the mapping of history-dependent state variables between different meshes. These are imbedded in a nonlinear incremental finite element procedure. For non-associated plasticity a standard continuum approach may lead to an ill-posed problem. Therefore, in the second part a generalization in the framework of a Cosserat theory is considered. The underlying equations possess a similar structure, and the adaptive finite element formulation can be extended in a straightforward manner. Numerical examples demonstrate the general applicability of the approach to elastoplastic problems including associated as well as non-associated plasticity. They show the superior behaviour of the Cosserat formulation in the case of localization phenomena also for non-associated plasticity. In an adaptive finite element approach elastoplastic problems with associated and non-associated flow rules are investigated. The first part of the paper deals with the underlying numerical formulation for a classical continuum model and a hierarchical h-adaptive mesh refinement strategy. Essential ingredients of the adaptive process are a suitable error indicator and transfer operations for the mapping of history-dependent state variables between different meshes. These are imbedded in a nonlinear incremental finite element procedure. For non-associated plasticity a standard continuum approach may lead to an ill-posed problem. Therefore, in the second part a generalization in the framework of a Cosserat theory is considered. The underlying equations possess a similar structure, and the adaptive finite element formulation can be extended in a straightforward manner. Numerical examples demonstrate the general applicability of the approach to elastoplastic problems including associated as well as non-associated plasticity. They show the superior behaviour of the Cosserat formulation in the case of localization phenomena also for non-associated plasticity. |
Author | Findeiss, R. Wunderlich, W. Steinl, G. Cramer, H. |
Author_xml | – sequence: 1 givenname: H. surname: Cramer fullname: Cramer, H. organization: Universität Rostock, Lehrstuhl für Baustatik/Baudynamik, PF 1210, 23952 Wismar, Germany – sequence: 2 givenname: R. surname: Findeiss fullname: Findeiss, R. organization: Technische Universität München, Lehrstuhl für Statik, Arcisstr. 21, 80333 München, Germany – sequence: 3 givenname: G. surname: Steinl fullname: Steinl, G. organization: Technische Universität München, Lehrstuhl für Statik, Arcisstr. 21, 80333 München, Germany – sequence: 4 givenname: W. surname: Wunderlich fullname: Wunderlich, W. organization: Technische Universität München, Lehrstuhl für Statik, Arcisstr. 21, 80333 München, Germany |
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Cites_doi | 10.1016/0045-7825(92)90020-K 10.1016/0045-7825(91)90184-8 |
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References | Wunderlich, Cramer, Rudolph (bib4) 1996 Cramer, Rudolph, Steinl, Wunderlich (bib1) 1996 Ortiz, Quigley (bib3) 1991; 90 Johnson, Hansbo (bib2) 1992; 101 Johnson (10.1016/S0045-7825(98)00336-3_bib2) 1992; 101 Ortiz (10.1016/S0045-7825(98)00336-3_bib3) 1991; 90 Wunderlich (10.1016/S0045-7825(98)00336-3_bib4) 1996 Cramer (10.1016/S0045-7825(98)00336-3_bib1) 1996 |
References_xml | – start-page: 2151 year: 1996 end-page: 2156 ident: bib4 article-title: Adaptive finite element approach to nonlinear geomechanical problems publication-title: 3rd Asian-Pacific Conference on Computational Mechanics contributor: fullname: Rudolph – volume: 101 start-page: 143 year: 1992 end-page: 181 ident: bib2 article-title: Adaptive finite element methods in computational mechanics publication-title: Comput. Methods Appl. Mech. Engrg. contributor: fullname: Hansbo – start-page: 151 year: 1996 end-page: 159 ident: bib1 article-title: A hierarchical adaptive finite element strategy for elastic-plastic problems publication-title: Advances in Finite Element Technology contributor: fullname: Wunderlich – volume: 90 start-page: 781 year: 1991 end-page: 804 ident: bib3 article-title: Adaptive mesh refinement in strain localization problems publication-title: Comput. Methods Appl. Mech. Engrg. contributor: fullname: Quigley – volume: 101 start-page: 143 year: 1992 ident: 10.1016/S0045-7825(98)00336-3_bib2 article-title: Adaptive finite element methods in computational mechanics publication-title: Comput. Methods Appl. Mech. Engrg. doi: 10.1016/0045-7825(92)90020-K contributor: fullname: Johnson – start-page: 2151 year: 1996 ident: 10.1016/S0045-7825(98)00336-3_bib4 article-title: Adaptive finite element approach to nonlinear geomechanical problems contributor: fullname: Wunderlich – start-page: 151 year: 1996 ident: 10.1016/S0045-7825(98)00336-3_bib1 article-title: A hierarchical adaptive finite element strategy for elastic-plastic problems contributor: fullname: Cramer – volume: 90 start-page: 781 year: 1991 ident: 10.1016/S0045-7825(98)00336-3_bib3 article-title: Adaptive mesh refinement in strain localization problems publication-title: Comput. Methods Appl. Mech. Engrg. doi: 10.1016/0045-7825(91)90184-8 contributor: fullname: Ortiz |
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