Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da Produção Científica da Marinha do Brasil (RI-MB) |
Texto Completo: | https://www.repositorio.mar.mil.br/handle/ripcmb/845587 |
Resumo: | We propose novel benchmark examples of dynamic failure paths of truss structures. Novelty arises from use of a logarithmic strain measure, within a total Lagrangian formulation, combined with a continuum material damage model. Previous benchmarks have considered the usual engineering strain measure, which is not always useful, as it can lead to material degeneration under finite levels of stress. Ductile material behavior has been considered in the literature, addressing plasticity and some material softening, but neglecting material degradation. Herein, damage accumulation is associated to the hydrostatic component of plastic strains, leading to a stable and explicit representation of material degradation. The original static formulation, presented elsewhere by the authors, is extended herein to the dynamic analysis of failure paths of truss structures. Several numerical examples from the literature are studied, and the differences in dynamic behavior are pointed out. In our implementation, as individual bars are damaged, elastic unloading and load redistribution are observed. When the critical damage hypothesized by Lemaitre is reached by individual bars, these are fully unloaded, with no material degeneration or numerical instability. Numerical results highlight the significant effects of material degradation in the dynamic behavior of truss structures under exceptional loads. We propose the set of examples addressed herein as the new benchmarks to which future developments in geometrical and material non-linear truss modelling will be compared. |
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Felipe, Túlio Raunyr CândidoBeck, André Teófilo2022-11-25T16:35:07Z2022-11-25T16:35:07Z2021https://www.repositorio.mar.mil.br/handle/ripcmb/845587We propose novel benchmark examples of dynamic failure paths of truss structures. Novelty arises from use of a logarithmic strain measure, within a total Lagrangian formulation, combined with a continuum material damage model. Previous benchmarks have considered the usual engineering strain measure, which is not always useful, as it can lead to material degeneration under finite levels of stress. Ductile material behavior has been considered in the literature, addressing plasticity and some material softening, but neglecting material degradation. Herein, damage accumulation is associated to the hydrostatic component of plastic strains, leading to a stable and explicit representation of material degradation. The original static formulation, presented elsewhere by the authors, is extended herein to the dynamic analysis of failure paths of truss structures. Several numerical examples from the literature are studied, and the differences in dynamic behavior are pointed out. In our implementation, as individual bars are damaged, elastic unloading and load redistribution are observed. When the critical damage hypothesized by Lemaitre is reached by individual bars, these are fully unloaded, with no material degeneration or numerical instability. Numerical results highlight the significant effects of material degradation in the dynamic behavior of truss structures under exceptional loads. We propose the set of examples addressed herein as the new benchmarks to which future developments in geometrical and material non-linear truss modelling will be compared.ElsevierEngenharia de materiais e metalúrgicaProgressive collapseFailure pathsTruss structuresContinuum damage mechanicsDynamic loadingDynamic analysis of failure paths of truss structures: benchmark examples including material degradationinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessengreponame:Repositório Institucional da Produção Científica da Marinha do Brasil (RI-MB)instname:Marinha do Brasil (MB)instacron:MBORIGINALFelipe_Beck.pdfFelipe_Beck.pdfapplication/pdf5057397https://www.repositorio.mar.mil.br/bitstream/ripcmb/845587/1/Felipe_Beck.pdf0fdb4b9b10b72f29f03380ee54f2b184MD51LICENSElicense.txtlicense.txttext/plain; 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dc.title.pt_BR.fl_str_mv |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
title |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
spellingShingle |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation Felipe, Túlio Raunyr Cândido Progressive collapse Failure paths Truss structures Continuum damage mechanics Dynamic loading Engenharia de materiais e metalúrgica |
title_short |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
title_full |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
title_fullStr |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
title_full_unstemmed |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
title_sort |
Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation |
author |
Felipe, Túlio Raunyr Cândido |
author_facet |
Felipe, Túlio Raunyr Cândido Beck, André Teófilo |
author_role |
author |
author2 |
Beck, André Teófilo |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Felipe, Túlio Raunyr Cândido Beck, André Teófilo |
dc.subject.por.fl_str_mv |
Progressive collapse Failure paths Truss structures Continuum damage mechanics Dynamic loading |
topic |
Progressive collapse Failure paths Truss structures Continuum damage mechanics Dynamic loading Engenharia de materiais e metalúrgica |
dc.subject.dgpm.pt_BR.fl_str_mv |
Engenharia de materiais e metalúrgica |
description |
We propose novel benchmark examples of dynamic failure paths of truss structures. Novelty arises from use of a logarithmic strain measure, within a total Lagrangian formulation, combined with a continuum material damage model. Previous benchmarks have considered the usual engineering strain measure, which is not always useful, as it can lead to material degeneration under finite levels of stress. Ductile material behavior has been considered in the literature, addressing plasticity and some material softening, but neglecting material degradation. Herein, damage accumulation is associated to the hydrostatic component of plastic strains, leading to a stable and explicit representation of material degradation. The original static formulation, presented elsewhere by the authors, is extended herein to the dynamic analysis of failure paths of truss structures. Several numerical examples from the literature are studied, and the differences in dynamic behavior are pointed out. In our implementation, as individual bars are damaged, elastic unloading and load redistribution are observed. When the critical damage hypothesized by Lemaitre is reached by individual bars, these are fully unloaded, with no material degeneration or numerical instability. Numerical results highlight the significant effects of material degradation in the dynamic behavior of truss structures under exceptional loads. We propose the set of examples addressed herein as the new benchmarks to which future developments in geometrical and material non-linear truss modelling will be compared. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021 |
dc.date.accessioned.fl_str_mv |
2022-11-25T16:35:07Z |
dc.date.available.fl_str_mv |
2022-11-25T16:35:07Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.repositorio.mar.mil.br/handle/ripcmb/845587 |
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https://www.repositorio.mar.mil.br/handle/ripcmb/845587 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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Repositório Institucional da Produção Científica da Marinha do Brasil (RI-MB) |
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Repositório Institucional da Produção Científica da Marinha do Brasil (RI-MB) |
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