Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads

Detalhes bibliográficos
Autor(a) principal: Borrego, L. P.
Data de Publicação: 2005
Outros Autores: Costa, J. M., Ferreira, J. M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/4242
https://doi.org/10.1016/j.tws.2004.11.001
Resumo: This study analyses the fatigue crack growth behaviour in thin AlMgSi1-T6 aluminium alloy sheets under several loading sequences containing periodic overloads. The observed fatigue crack growth behaviour is compared to constant amplitude loading and discussed in terms of type of loading sequence, intermediate baseline cycles and stress ratio. The crack closure parameter U was obtained for periodic single overload tests and compared with the crack growth transients. Crack retardation increases with overload periodicity and decreases with stress ratio increase. Higher crack growth retardation was observed under loading sequences with decreasing load levels in comparison to increasing ones as well as under loading sequences with extended periodicity. In spite of some discrepancy, attributed to the quick change of the closure levels, it is clear that plasticity-induced crack closure plays an important role on the load interaction effects observed in this aluminium alloy.
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spelling Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloadsAluminiumThin walled-sectionsPeriodic overloadsCrack growthCrack closureThis study analyses the fatigue crack growth behaviour in thin AlMgSi1-T6 aluminium alloy sheets under several loading sequences containing periodic overloads. The observed fatigue crack growth behaviour is compared to constant amplitude loading and discussed in terms of type of loading sequence, intermediate baseline cycles and stress ratio. The crack closure parameter U was obtained for periodic single overload tests and compared with the crack growth transients. Crack retardation increases with overload periodicity and decreases with stress ratio increase. Higher crack growth retardation was observed under loading sequences with decreasing load levels in comparison to increasing ones as well as under loading sequences with extended periodicity. In spite of some discrepancy, attributed to the quick change of the closure levels, it is clear that plasticity-induced crack closure plays an important role on the load interaction effects observed in this aluminium alloy.http://www.sciencedirect.com/science/article/B6V59-4FMK8KP-1/1/5927ae181f89b8559d49201d964d88662005info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4242http://hdl.handle.net/10316/4242https://doi.org/10.1016/j.tws.2004.11.001engThin-Walled Structures. 43:5 (2005) 772-788Borrego, L. P.Costa, J. M.Ferreira, J. M.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:59:25Zoai:estudogeral.uc.pt:10316/4242Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:58:26.747817Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
title Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
spellingShingle Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
Borrego, L. P.
Aluminium
Thin walled-sections
Periodic overloads
Crack growth
Crack closure
title_short Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
title_full Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
title_fullStr Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
title_full_unstemmed Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
title_sort Fatigue crack growth in thin aluminium alloy sheets under loading sequences with periodic overloads
author Borrego, L. P.
author_facet Borrego, L. P.
Costa, J. M.
Ferreira, J. M.
author_role author
author2 Costa, J. M.
Ferreira, J. M.
author2_role author
author
dc.contributor.author.fl_str_mv Borrego, L. P.
Costa, J. M.
Ferreira, J. M.
dc.subject.por.fl_str_mv Aluminium
Thin walled-sections
Periodic overloads
Crack growth
Crack closure
topic Aluminium
Thin walled-sections
Periodic overloads
Crack growth
Crack closure
description This study analyses the fatigue crack growth behaviour in thin AlMgSi1-T6 aluminium alloy sheets under several loading sequences containing periodic overloads. The observed fatigue crack growth behaviour is compared to constant amplitude loading and discussed in terms of type of loading sequence, intermediate baseline cycles and stress ratio. The crack closure parameter U was obtained for periodic single overload tests and compared with the crack growth transients. Crack retardation increases with overload periodicity and decreases with stress ratio increase. Higher crack growth retardation was observed under loading sequences with decreasing load levels in comparison to increasing ones as well as under loading sequences with extended periodicity. In spite of some discrepancy, attributed to the quick change of the closure levels, it is clear that plasticity-induced crack closure plays an important role on the load interaction effects observed in this aluminium alloy.
publishDate 2005
dc.date.none.fl_str_mv 2005
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 http://hdl.handle.net/10316/4242
http://hdl.handle.net/10316/4242
https://doi.org/10.1016/j.tws.2004.11.001
url http://hdl.handle.net/10316/4242
https://doi.org/10.1016/j.tws.2004.11.001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Thin-Walled Structures. 43:5 (2005) 772-788
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv aplication/PDF
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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