Internal voids as stress relievers and a palliative in fretting fatigue

Currently, additive manufacturing with metals is an increasingly popular technique that allows the manufacturing of pieces of difficult shapes, nearly impossible to make with other techniques. Usually, these shapes try to optimize the solid to have the same strength with a lower weight. The fatigue...

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Autores: Erena Guardia, Diego, Vázquez Valeo, Jesús, Navarro Pintado, Carlos, Domínguez Abascal, Jaime
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2018
País:España
Recursos:Universidad de Sevilla (US)
Repositório:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/134019
Acesso em linha:https://hdl.handle.net/11441/134019
https://doi.org/10.1016/j.proeng.2018.06.001
Access Level:Acceso aberto
Palavra-chave:Fretting
Voids
Numerical model
Cylindrical contact
Palliative
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spelling Internal voids as stress relievers and a palliative in fretting fatigueErena Guardia, DiegoVázquez Valeo, JesúsNavarro Pintado, CarlosDomínguez Abascal, JaimeFrettingVoidsNumerical modelCylindrical contactPalliativeCurrently, additive manufacturing with metals is an increasingly popular technique that allows the manufacturing of pieces of difficult shapes, nearly impossible to make with other techniques. Usually, these shapes try to optimize the solid to have the same strength with a lower weight. The fatigue behavior of the material of the components manufactured with this technique is a field in development. On the other hand, fretting fatigue is a common type of fatigue where a “stress concentration” appears due to the contact between two components. There are some procedures used to increase fatigue life in this situation (shot peening, surface knurling, etc.). This paper tries to analyze the possible beneficial effect on fatigue life of introducing voids inside the material in components under fretting, which is feasible now thanks to additive manufacturing. The problem under study is, for now, a 2D simplification where a cylinder is in contact with a half plane and a normal constant load and a variable tangential load are applied. This geometry has been numerically simulated, introducing a circular hole below the surface. The effect of this hole is to make the contact more elastic, which decreases the stresses near the surface. This work analyses and compares the stress and strain fields and Smith-Watson-Topper multiaxial fatigue parameter in the areas sensitives to fretting with respect to a case with homogeneous material (no internal voids). Various configurations changing different parameters like size and position of the hole, friction coefficient and the size of the slip zone have been considered. The problem analyzed in this paper is two-dimensional, therefore there would be no need to use additive manufacturing in a real situation. However, the results obtained in this paper indicate that it could also work in 3D. Actually, it is in a real three-dimensional problem where the additive manufacturing would be necessary for the introduction of voids inside the material to improve fatigue life.Ministerio de Economía y Competitividad PI2014- 59160-PElsevierMecánica de Medios Continuos y Teoría de Estructuras2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/134019https://doi.org/10.1016/j.proeng.2018.06.001reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésProcedia Engineering, 213, 846-855.PI2014- 59160-Phttps://www.sciencedirect.com/science/article/pii/S1877705818303424info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1340192026-06-17T12:51:07Z
dc.title.none.fl_str_mv Internal voids as stress relievers and a palliative in fretting fatigue
title Internal voids as stress relievers and a palliative in fretting fatigue
spellingShingle Internal voids as stress relievers and a palliative in fretting fatigue
Erena Guardia, Diego
Fretting
Voids
Numerical model
Cylindrical contact
Palliative
title_short Internal voids as stress relievers and a palliative in fretting fatigue
title_full Internal voids as stress relievers and a palliative in fretting fatigue
title_fullStr Internal voids as stress relievers and a palliative in fretting fatigue
title_full_unstemmed Internal voids as stress relievers and a palliative in fretting fatigue
title_sort Internal voids as stress relievers and a palliative in fretting fatigue
dc.creator.none.fl_str_mv Erena Guardia, Diego
Vázquez Valeo, Jesús
Navarro Pintado, Carlos
Domínguez Abascal, Jaime
author Erena Guardia, Diego
author_facet Erena Guardia, Diego
Vázquez Valeo, Jesús
Navarro Pintado, Carlos
Domínguez Abascal, Jaime
author_role author
author2 Vázquez Valeo, Jesús
Navarro Pintado, Carlos
Domínguez Abascal, Jaime
author2_role author
author
author
dc.contributor.none.fl_str_mv Mecánica de Medios Continuos y Teoría de Estructuras
dc.subject.none.fl_str_mv Fretting
Voids
Numerical model
Cylindrical contact
Palliative
topic Fretting
Voids
Numerical model
Cylindrical contact
Palliative
description Currently, additive manufacturing with metals is an increasingly popular technique that allows the manufacturing of pieces of difficult shapes, nearly impossible to make with other techniques. Usually, these shapes try to optimize the solid to have the same strength with a lower weight. The fatigue behavior of the material of the components manufactured with this technique is a field in development. On the other hand, fretting fatigue is a common type of fatigue where a “stress concentration” appears due to the contact between two components. There are some procedures used to increase fatigue life in this situation (shot peening, surface knurling, etc.). This paper tries to analyze the possible beneficial effect on fatigue life of introducing voids inside the material in components under fretting, which is feasible now thanks to additive manufacturing. The problem under study is, for now, a 2D simplification where a cylinder is in contact with a half plane and a normal constant load and a variable tangential load are applied. This geometry has been numerically simulated, introducing a circular hole below the surface. The effect of this hole is to make the contact more elastic, which decreases the stresses near the surface. This work analyses and compares the stress and strain fields and Smith-Watson-Topper multiaxial fatigue parameter in the areas sensitives to fretting with respect to a case with homogeneous material (no internal voids). Various configurations changing different parameters like size and position of the hole, friction coefficient and the size of the slip zone have been considered. The problem analyzed in this paper is two-dimensional, therefore there would be no need to use additive manufacturing in a real situation. However, the results obtained in this paper indicate that it could also work in 3D. Actually, it is in a real three-dimensional problem where the additive manufacturing would be necessary for the introduction of voids inside the material to improve fatigue life.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/134019
https://doi.org/10.1016/j.proeng.2018.06.001
url https://hdl.handle.net/11441/134019
https://doi.org/10.1016/j.proeng.2018.06.001
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Procedia Engineering, 213, 846-855.
PI2014- 59160-P
https://www.sciencedirect.com/science/article/pii/S1877705818303424
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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