Life estimates for fatigue crack growth with constant amplitude loading using numerical integration
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
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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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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1798315227165491200 |