Evaluation of overload effects on fatigue crack growth and closure
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/4272 https://doi.org/10.1016/S0013-7944(02)00119-4 |
Resumo: | Fatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline [Delta]K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant [Delta]K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline [Delta]K level and stress ratio. The crack closure parameter U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account. |
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Evaluation of overload effects on fatigue crack growth and closureAluminium alloysOverloadsCrack closureDiscontinuous closurePartial closure modelFatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline [Delta]K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant [Delta]K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline [Delta]K level and stress ratio. The crack closure parameter U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account.http://www.sciencedirect.com/science/article/B6V2R-46WPH0W-3/1/82b49d3e31362370a08505d5d300b60c2003info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4272http://hdl.handle.net/10316/4272https://doi.org/10.1016/S0013-7944(02)00119-4engEngineering Fracture Mechanics. 70:11 (2003) 1379-1397Borrego, L. P.Ferreira, J. M.Pinho da Cruz, J. M.Costa, 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:RCAAP2020-11-06T16:59:29Zoai:estudogeral.uc.pt:10316/4272Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:58:28.603597Repositório 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 |
Evaluation of overload effects on fatigue crack growth and closure |
title |
Evaluation of overload effects on fatigue crack growth and closure |
spellingShingle |
Evaluation of overload effects on fatigue crack growth and closure Borrego, L. P. Aluminium alloys Overloads Crack closure Discontinuous closure Partial closure model |
title_short |
Evaluation of overload effects on fatigue crack growth and closure |
title_full |
Evaluation of overload effects on fatigue crack growth and closure |
title_fullStr |
Evaluation of overload effects on fatigue crack growth and closure |
title_full_unstemmed |
Evaluation of overload effects on fatigue crack growth and closure |
title_sort |
Evaluation of overload effects on fatigue crack growth and closure |
author |
Borrego, L. P. |
author_facet |
Borrego, L. P. Ferreira, J. M. Pinho da Cruz, J. M. Costa, J. M. |
author_role |
author |
author2 |
Ferreira, J. M. Pinho da Cruz, J. M. Costa, J. M. |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Borrego, L. P. Ferreira, J. M. Pinho da Cruz, J. M. Costa, J. M. |
dc.subject.por.fl_str_mv |
Aluminium alloys Overloads Crack closure Discontinuous closure Partial closure model |
topic |
Aluminium alloys Overloads Crack closure Discontinuous closure Partial closure model |
description |
Fatigue crack propagation tests with single tensile peak overloads have been performed in 6082-T6 aluminium alloy at several baseline [Delta]K levels and stress ratios of 0.05 and 0.25. The tests were carried out at constant [Delta]K conditions. Crack closure was monitored in all tests by the compliance technique using a pin microgauge. The observed transient post-overload behaviour is discussed in terms of overload ratio, baseline [Delta]K level and stress ratio. The crack closure parameter U was obtained and compared with the crack growth transients. Experimental support is given for the hypothesis that plasticity-induced closure is the main cause of overload retardation for plane stress conditions. Predictions based on crack closure measurements show good correlation with the observed crack growth rates for all the post-overload transients when discontinuous closure is properly taken into account. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 |
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/10316/4272 http://hdl.handle.net/10316/4272 https://doi.org/10.1016/S0013-7944(02)00119-4 |
url |
http://hdl.handle.net/10316/4272 https://doi.org/10.1016/S0013-7944(02)00119-4 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Engineering Fracture Mechanics. 70:11 (2003) 1379-1397 |
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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