Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation

Felipe, Túlio Raunyr Cândido; Beck, André Teófilo

Repositório Institucional da Produção Científica da Marinha do Brasil (RI-MB)

Use este identificador para citar ou linkar para este item: https://www.repositorio.mar.mil.br/handle/ripcmb/845587

Registro completo de metadados

Campo DC	Valor	Idioma
dc.contributor.author	Felipe, Túlio Raunyr Cândido	-
dc.contributor.author	Beck, André Teófilo	-
dc.date.accessioned	2022-11-25T16:35:07Z	-
dc.date.available	2022-11-25T16:35:07Z	-
dc.date.issued	2021	-
dc.identifier.uri	https://www.repositorio.mar.mil.br/handle/ripcmb/845587	-
dc.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.	pt_BR
dc.language.iso	en_US	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	openAccess	pt_BR
dc.subject	Progressive collapse	pt_BR
dc.subject	Failure paths	pt_BR
dc.subject	Truss structures	pt_BR
dc.subject	Continuum damage mechanics	pt_BR
dc.subject	Dynamic loading	pt_BR
dc.title	Dynamic analysis of failure paths of truss structures: benchmark examples including material degradation	pt_BR
dc.type	journalArticle	pt_BR
dc.subject.dgpm	Engenharia de materiais e metalúrgica	pt_BR
Aparece nas coleções:	Engenharia Naval: Coleção de Artigos

Arquivos associados a este item:

Arquivo	Descrição	Tamanho	Formato
Felipe_Beck.pdf		4,94 MB	Adobe PDF	Visualizar/Abrir

Mostrar registro simples do item Visualizar estatísticas