Fretting fatigue under variable amplitude loading

Detalhes bibliográficos
Autor(a) principal: Pinto, André Luis
Data de Publicação: 2022
Tipo de documento: Tese
Idioma: eng
Título da fonte: Repositório Institucional da UnB
Texto Completo: http://repositorio2.unb.br/jspui/handle/10482/46564
Resumo: Tese (doutorado) — Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, Programa de Pós-Graduação em Ciências Mecânicas, 2022.
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spelling Fretting fatigue under variable amplitude loadingFadiga por frettingTrincas (Engenharia) - propagaçãoCargas variáveisTese (doutorado) — Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, Programa de Pós-Graduação em Ciências Mecânicas, 2022.Agência Nacional de Energia Elétrica (ANEEL).Generally, the fretting fatigue problem is treated with constant amplitude loading. However, this condition is not the reality for industrial applications. Although there are few studies on fretting fatigue under variable amplitude loadings, they use a simplistic approach to life estimation (unable to capture the effects of the complex multiaxial and non-proportional stress field that exists under the contact interface) and only the bulk fatigue load has its amplitude alternating. The objective of this work is to propose a numerical methodology for the life assessment of components subjected to fretting fatigue under variable amplitude loading and to study the effects of these loads. For this, experimental tests were carried out by applying H-L (High-Low) and L-H (Low-High) loading blocks to the tangential load, that is, the contact normal load and the amplitude of the bulk fatigue load were kept constant while the tangential load has its alternating amplitude. The numerical methodology proposed for fretting fatigue life assessment includes the wear effect and crack propagation. The multiaxial fatigue parameter SWT, the theory of critical distance TCD, and Miners’ linear rule were used to compute the damage in the crack nucleation phase. The node-displacement algorithm based on Archard’s law was applied to account wear. In the crack propagation phase, the CDM (critical direction method) was used to estimate the crack initiation angle considering the worn contact surface, and then the crack is modeled and propagated. The still limited range of experimental data done in this work for fretting fatigue under varying loading blocks seems to indicate that the loading sequence has an effect on the accumulated fatigue damage, mainly to the H-L loading sequences. Based on this observation, a new non-linear damage model was proposed. Using this new damage model, the life estimation results were within a scatter band of 1.2.Faculdade de Tecnologia (FT)Departamento de Engenharia Mecânica (FT ENM)Programa de Pós-Graduação em Ciências MecânicasAraújo, José AlexanderTalemi, Rezaandreluis.eng.mecanica@gmail.comPinto, André Luis2023-09-28T16:55:07Z2023-09-28T16:55:07Z2023-09-282022-09-21info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfPINTO, André Luis. Fretting fatigue under variable amplitude loading. 2022. xxvi, 182 f., il. Tese (Doutorado em Ciências Mecânicas) — Universidade de Brasília, Brasília, 2022.http://repositorio2.unb.br/jspui/handle/10482/46564enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNB2023-09-28T16:55:07Zoai:repositorio.unb.br:10482/46564Repositório InstitucionalPUBhttps://repositorio.unb.br/oai/requestrepositorio@unb.bropendoar:2023-09-28T16:55:07Repositório Institucional da UnB - Universidade de Brasília (UnB)false
dc.title.none.fl_str_mv Fretting fatigue under variable amplitude loading
title Fretting fatigue under variable amplitude loading
spellingShingle Fretting fatigue under variable amplitude loading
Pinto, André Luis
Fadiga por fretting
Trincas (Engenharia) - propagação
Cargas variáveis
title_short Fretting fatigue under variable amplitude loading
title_full Fretting fatigue under variable amplitude loading
title_fullStr Fretting fatigue under variable amplitude loading
title_full_unstemmed Fretting fatigue under variable amplitude loading
title_sort Fretting fatigue under variable amplitude loading
author Pinto, André Luis
author_facet Pinto, André Luis
author_role author
dc.contributor.none.fl_str_mv Araújo, José Alexander
Talemi, Reza
andreluis.eng.mecanica@gmail.com
dc.contributor.author.fl_str_mv Pinto, André Luis
dc.subject.por.fl_str_mv Fadiga por fretting
Trincas (Engenharia) - propagação
Cargas variáveis
topic Fadiga por fretting
Trincas (Engenharia) - propagação
Cargas variáveis
description Tese (doutorado) — Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, Programa de Pós-Graduação em Ciências Mecânicas, 2022.
publishDate 2022
dc.date.none.fl_str_mv 2022-09-21
2023-09-28T16:55:07Z
2023-09-28T16:55:07Z
2023-09-28
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv PINTO, André Luis. Fretting fatigue under variable amplitude loading. 2022. xxvi, 182 f., il. Tese (Doutorado em Ciências Mecânicas) — Universidade de Brasília, Brasília, 2022.
http://repositorio2.unb.br/jspui/handle/10482/46564
identifier_str_mv PINTO, André Luis. Fretting fatigue under variable amplitude loading. 2022. xxvi, 182 f., il. Tese (Doutorado em Ciências Mecânicas) — Universidade de Brasília, Brasília, 2022.
url http://repositorio2.unb.br/jspui/handle/10482/46564
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UnB
instname:Universidade de Brasília (UnB)
instacron:UNB
instname_str Universidade de Brasília (UnB)
instacron_str UNB
institution UNB
reponame_str Repositório Institucional da UnB
collection Repositório Institucional da UnB
repository.name.fl_str_mv Repositório Institucional da UnB - Universidade de Brasília (UnB)
repository.mail.fl_str_mv repositorio@unb.br
_version_ 1814508193675476992

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