Life estimates for fatigue crack growth with constant amplitude loading using numerical integration

Detalhes bibliográficos
Autor(a) principal: Fernandes, Daniel de Oliveira
Data de Publicação: 2020
Outros Autores: Souza, Beatriz Ferreira, Anflor, Carla Tatiana Mota
Tipo de documento: Artigo
Idioma: por
Título da fonte: Revista Interdisciplinar de Pesquisa em Engenharia
Texto Completo: https://periodicos.unb.br/index.php/ripe/article/view/33771
Resumo: It is known that fracture mechanics has become very important in the design of projects and the development of the maintenance plan for a particular component. Better predictions of failure directly influence the economic cost of the project beneficially, when it is possible to guarantee a safe life in components with the presence of a crack. In this way, several studies have contributed to improving the prediction of the failure of a certain part. The objective of this work is to define the mechanical properties of 7075 T6 aluminum as fracture toughness and Paris law C and m coefficients for crack growth, in addition to comparing the fatigue crack growth test experimentally with the numerical integration method for a load of constant amplitude with a load ratio (R) equal to 0.1. The results presented were satisfactory, enabling the obtaining of reliable values of the Paris constants, as well as the verification of the crack propagation rate when compared to the literature data. Finally, with the analysis of the results, it can be inferred that the use of the coefficients obtained experimentally provides more conservative and precise values of the life estimate than those available in the literature for the evaluated material. This, therefore, further emphasizes the importance of experimental tests in fracture mechanics.
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spelling Life estimates for fatigue crack growth with constant amplitude loading using numerical integrationPredição de crescimento de trinca por fadiga com carregamento de amplitude constante usando integração numéricaCrescimento de trinca. Vida fadiga. Mecânica da fratura. Integração numérica.Crack growth. Fatigue life. Fracture mechanics. Numerical integration.It is known that fracture mechanics has become very important in the design of projects and the development of the maintenance plan for a particular component. Better predictions of failure directly influence the economic cost of the project beneficially, when it is possible to guarantee a safe life in components with the presence of a crack. In this way, several studies have contributed to improving the prediction of the failure of a certain part. The objective of this work is to define the mechanical properties of 7075 T6 aluminum as fracture toughness and Paris law C and m coefficients for crack growth, in addition to comparing the fatigue crack growth test experimentally with the numerical integration method for a load of constant amplitude with a load ratio (R) equal to 0.1. The results presented were satisfactory, enabling the obtaining of reliable values of the Paris constants, as well as the verification of the crack propagation rate when compared to the literature data. Finally, with the analysis of the results, it can be inferred that the use of the coefficients obtained experimentally provides more conservative and precise values of the life estimate than those available in the literature for the evaluated material. This, therefore, further emphasizes the importance of experimental tests in fracture mechanics.Sabe-se que a mecânica da fratura tem se tornado muito importante na concepção de projetos e na elaboração do plano de manutenção de um determinado componente. Melhores previsões de falha influenciam diretamente no custo econômico do projeto de forma benéfica, quando se é possível garantir uma vida segura em componentes com presença de trinca. Deste modo, diversas pesquisas têm contribuído para melhorar a previsão de falha de uma determinada peça. O objetivo deste trabalho é definir as propriedades mecânicas do alumínio 7075 T6 como tenacidade à fratura e os coeficientes da lei de Paris C,  e m, para crescimento de trincas, além de comparar o ensaio experimental de crescimento de trinca por fadiga com o método de integração numérica para um carregamento de amplitude constante com razão de carregamento (R ) igual 0,1. Os resultados apresentados mostraram-se satisfatórios propiciando a obtenção de valores confiáveis das constantes de Paris, bem como, a verificação da taxa de propagação de trincas se comparados aos dados da literatura. Por fim, com a análise dos resultados pode-se inferir que a utilização dos coeficientes obtidos experimentalmente fornece valores mais conservadores e precisos da estimativa de vida do que aqueles disponíveis na literatura para o material avaliado. Isso, portanto, ressalta ainda mais a importância dos ensaios experimentais na mecânica da fratura.Programa de Pós-Graduação em Integridade de Materiais da Engenharia2020-09-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.unb.br/index.php/ripe/article/view/33771Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 6 No. 1 (2020): Revista Interdisciplinar de Pesquisa em Engenharia; 71-80Revista Interdisciplinar de Pesquisa em Engenharia; v. 6 n. 1 (2020): Revista Interdisciplinar de Pesquisa em Engenharia; 71-802447-6102reponame:Revista Interdisciplinar de Pesquisa em Engenhariainstname:Universidade de Brasília (UnB)instacron:UNBporhttps://periodicos.unb.br/index.php/ripe/article/view/33771/27485Copyright (c) 2020 Revista Interdisciplinar de Pesquisa em Engenhariahttps://creativecommons.org/licenses/by-nd/4.0info:eu-repo/semantics/openAccessFernandes, Daniel de OliveiraSouza, Beatriz Ferreira Anflor, Carla Tatiana Mota2020-09-02T23:44:53Zoai:ojs.pkp.sfu.ca:article/33771Revistahttps://periodicos.unb.br/index.php/ripePUBhttps://periodicos.unb.br/index.php/ripe/oaianflor@unb.br2447-61022447-6102opendoar:2020-09-02T23:44:53Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB)false
dc.title.none.fl_str_mv Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
Predição de crescimento de trinca por fadiga com carregamento de amplitude constante usando integração numérica
title Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
spellingShingle Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
Fernandes, Daniel de Oliveira
Crescimento de trinca. Vida fadiga. Mecânica da fratura. Integração numérica.
Crack growth. Fatigue life. Fracture mechanics. Numerical integration.
title_short Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
title_full Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
title_fullStr Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
title_full_unstemmed Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
title_sort Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
author Fernandes, Daniel de Oliveira
author_facet Fernandes, Daniel de Oliveira
Souza, Beatriz Ferreira
Anflor, Carla Tatiana Mota
author_role author
author2 Souza, Beatriz Ferreira
Anflor, Carla Tatiana Mota
author2_role author
author
dc.contributor.author.fl_str_mv Fernandes, Daniel de Oliveira
Souza, Beatriz Ferreira
Anflor, Carla Tatiana Mota
dc.subject.por.fl_str_mv Crescimento de trinca. Vida fadiga. Mecânica da fratura. Integração numérica.
Crack growth. Fatigue life. Fracture mechanics. Numerical integration.
topic Crescimento de trinca. Vida fadiga. Mecânica da fratura. Integração numérica.
Crack growth. Fatigue life. Fracture mechanics. Numerical integration.
description It is known that fracture mechanics has become very important in the design of projects and the development of the maintenance plan for a particular component. Better predictions of failure directly influence the economic cost of the project beneficially, when it is possible to guarantee a safe life in components with the presence of a crack. In this way, several studies have contributed to improving the prediction of the failure of a certain part. The objective of this work is to define the mechanical properties of 7075 T6 aluminum as fracture toughness and Paris law C and m coefficients for crack growth, in addition to comparing the fatigue crack growth test experimentally with the numerical integration method for a load of constant amplitude with a load ratio (R) equal to 0.1. The results presented were satisfactory, enabling the obtaining of reliable values of the Paris constants, as well as the verification of the crack propagation rate when compared to the literature data. Finally, with the analysis of the results, it can be inferred that the use of the coefficients obtained experimentally provides more conservative and precise values of the life estimate than those available in the literature for the evaluated material. This, therefore, further emphasizes the importance of experimental tests in fracture mechanics.
publishDate 2020
dc.date.none.fl_str_mv 2020-09-02
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.unb.br/index.php/ripe/article/view/33771
url https://periodicos.unb.br/index.php/ripe/article/view/33771
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.unb.br/index.php/ripe/article/view/33771/27485
dc.rights.driver.fl_str_mv Copyright (c) 2020 Revista Interdisciplinar de Pesquisa em Engenharia
https://creativecommons.org/licenses/by-nd/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2020 Revista Interdisciplinar de Pesquisa em Engenharia
https://creativecommons.org/licenses/by-nd/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Programa de Pós-Graduação em Integridade de Materiais da Engenharia
publisher.none.fl_str_mv Programa de Pós-Graduação em Integridade de Materiais da Engenharia
dc.source.none.fl_str_mv Revista Interdisciplinar de Pesquisa em Engenharia; Vol. 6 No. 1 (2020): Revista Interdisciplinar de Pesquisa em Engenharia; 71-80
Revista Interdisciplinar de Pesquisa em Engenharia; v. 6 n. 1 (2020): Revista Interdisciplinar de Pesquisa em Engenharia; 71-80
2447-6102
reponame:Revista Interdisciplinar de Pesquisa em Engenharia
instname:Universidade de Brasília (UnB)
instacron:UNB
instname_str Universidade de Brasília (UnB)
instacron_str UNB
institution UNB
reponame_str Revista Interdisciplinar de Pesquisa em Engenharia
collection Revista Interdisciplinar de Pesquisa em Engenharia
repository.name.fl_str_mv Revista Interdisciplinar de Pesquisa em Engenharia - Universidade de Brasília (UnB)
repository.mail.fl_str_mv anflor@unb.br
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