Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens

Detalhes bibliográficos
Autor(a) principal: Branco, R.
Data de Publicação: 2008
Outros Autores: Antunes, F. V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/4175
https://doi.org/10.1016/j.engfracmech.2007.12.012
Resumo: A numerical procedure was employed to study the shape evolution of fatigue cracks in Middle Cracked Tension specimens. This iterative procedure consists of a 3D finite element analysis to obtain the displacement field in the cracked body, calculation of stress intensity factors along crack front and definition of local crack advances considering the Paris law. Numerical predictions were compared with experimental crack shapes with a good agreement. The evolution of crack shape was analysed for different propagation conditions considering robust dependent parameters. Two main propagation stages were identified: an initial transient stage highly dependent on initial crack shape and a stable stage where the crack follows preferred paths. Mathematical models were proposed for transient and stable stages consisting of exponential and polynomial functions, respectively. The transition between both stages was defined considering two criteria: the rate of shape variation and the distance to stable shape. Finally, the crack shape change was linked with the distribution of stress intensity factor along crack front.
id RCAP_37b3a795f0a4ecdeccbe2e581e48f1c7
oai_identifier_str oai:estudogeral.uc.pt:10316/4175
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimensCrack shape evolutionMT specimenTunnelling parameterStress intensity factorA numerical procedure was employed to study the shape evolution of fatigue cracks in Middle Cracked Tension specimens. This iterative procedure consists of a 3D finite element analysis to obtain the displacement field in the cracked body, calculation of stress intensity factors along crack front and definition of local crack advances considering the Paris law. Numerical predictions were compared with experimental crack shapes with a good agreement. The evolution of crack shape was analysed for different propagation conditions considering robust dependent parameters. Two main propagation stages were identified: an initial transient stage highly dependent on initial crack shape and a stable stage where the crack follows preferred paths. Mathematical models were proposed for transient and stable stages consisting of exponential and polynomial functions, respectively. The transition between both stages was defined considering two criteria: the rate of shape variation and the distance to stable shape. Finally, the crack shape change was linked with the distribution of stress intensity factor along crack front.http://www.sciencedirect.com/science/article/B6V2R-4RGFD3P-1/1/e08212c92d2476b00aceb521ee4e521b2008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4175http://hdl.handle.net/10316/4175https://doi.org/10.1016/j.engfracmech.2007.12.012engEngineering Fracture Mechanics. 75:10 (2008) 3020-3037Branco, R.Antunes, F. V.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:RCAAP2020-11-06T16:49:02Zoai:estudogeral.uc.pt:10316/4175Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:58:35.100533Repositório 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 Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
title Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
spellingShingle Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
Branco, R.
Crack shape evolution
MT specimen
Tunnelling parameter
Stress intensity factor
title_short Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
title_full Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
title_fullStr Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
title_full_unstemmed Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
title_sort Finite element modelling and analysis of crack shape evolution in mode-I fatigue Middle Cracked Tension specimens
author Branco, R.
author_facet Branco, R.
Antunes, F. V.
author_role author
author2 Antunes, F. V.
author2_role author
dc.contributor.author.fl_str_mv Branco, R.
Antunes, F. V.
dc.subject.por.fl_str_mv Crack shape evolution
MT specimen
Tunnelling parameter
Stress intensity factor
topic Crack shape evolution
MT specimen
Tunnelling parameter
Stress intensity factor
description A numerical procedure was employed to study the shape evolution of fatigue cracks in Middle Cracked Tension specimens. This iterative procedure consists of a 3D finite element analysis to obtain the displacement field in the cracked body, calculation of stress intensity factors along crack front and definition of local crack advances considering the Paris law. Numerical predictions were compared with experimental crack shapes with a good agreement. The evolution of crack shape was analysed for different propagation conditions considering robust dependent parameters. Two main propagation stages were identified: an initial transient stage highly dependent on initial crack shape and a stable stage where the crack follows preferred paths. Mathematical models were proposed for transient and stable stages consisting of exponential and polynomial functions, respectively. The transition between both stages was defined considering two criteria: the rate of shape variation and the distance to stable shape. Finally, the crack shape change was linked with the distribution of stress intensity factor along crack front.
publishDate 2008
dc.date.none.fl_str_mv 2008
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/10316/4175
http://hdl.handle.net/10316/4175
https://doi.org/10.1016/j.engfracmech.2007.12.012
url http://hdl.handle.net/10316/4175
https://doi.org/10.1016/j.engfracmech.2007.12.012
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Engineering Fracture Mechanics. 75:10 (2008) 3020-3037
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
repository.mail.fl_str_mv
_version_ 1799133877551235072