Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/101269 https://doi.org/10.1016/j.promfg.2020.04.167 |
Resumo: | Additive manufacturing (AM) of metallic components has received large attention in the last decade, particularly the selective laser melting (SLM) process, due to its ability to produce complex and customized parts. However, the high residual stresses generated by the thermal cycles can lead to significant distortions and ultimately to the part cracking. Therefore, several numerical simulation tools have been adopted to predict and mitigate the unwanted part distortion. This study presents a thermo-mechanical model able to simulate the SLM process, considering multitrack within a single powder layer. The finite element model considers the powder-liquid-solid phase changes, i.e. includes melting, solidification and cooling phenomena. The thermal analysis is based on the transient heat conduction problem, considering a volumetric moving heat source. The mechanical analysis is based in an elastoplastic constitutive law, which predicts the residual stresses through the strains induced by the thermal gradients. Both the thermal and the mechanical material properties are assumed as temperature dependent. The main goal of this study is to assess the effect of the scan strategy on the residual stresses generated in the built component. In this context, unidirectional and alternating scan strategies are compared in terms of thermal history and consequent residual stresses generated. |
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Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting ProcessAdditive manufacturingSelective laser meltingThermo-mechanical modelingResidual stressesAdditive manufacturing (AM) of metallic components has received large attention in the last decade, particularly the selective laser melting (SLM) process, due to its ability to produce complex and customized parts. However, the high residual stresses generated by the thermal cycles can lead to significant distortions and ultimately to the part cracking. Therefore, several numerical simulation tools have been adopted to predict and mitigate the unwanted part distortion. This study presents a thermo-mechanical model able to simulate the SLM process, considering multitrack within a single powder layer. The finite element model considers the powder-liquid-solid phase changes, i.e. includes melting, solidification and cooling phenomena. The thermal analysis is based on the transient heat conduction problem, considering a volumetric moving heat source. The mechanical analysis is based in an elastoplastic constitutive law, which predicts the residual stresses through the strains induced by the thermal gradients. Both the thermal and the mechanical material properties are assumed as temperature dependent. The main goal of this study is to assess the effect of the scan strategy on the residual stresses generated in the built component. In this context, unidirectional and alternating scan strategies are compared in terms of thermal history and consequent residual stresses generated.2020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/101269http://hdl.handle.net/10316/101269https://doi.org/10.1016/j.promfg.2020.04.167eng23519789Marques, Bruno M.Andrade, Carlos M.Neto, Diogo M.Oliveira, Marta C.Alves, José L.Menezes, Luís F.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:RCAAP2023-04-16T09:18:23Zoai:estudogeral.uc.pt:10316/101269Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:18:30.027641Repositório 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 |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
title |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
spellingShingle |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process Marques, Bruno M. Additive manufacturing Selective laser melting Thermo-mechanical modeling Residual stresses |
title_short |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
title_full |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
title_fullStr |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
title_full_unstemmed |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
title_sort |
Numerical Analysis of Residual Stresses in Parts Produced by Selective Laser Melting Process |
author |
Marques, Bruno M. |
author_facet |
Marques, Bruno M. Andrade, Carlos M. Neto, Diogo M. Oliveira, Marta C. Alves, José L. Menezes, Luís F. |
author_role |
author |
author2 |
Andrade, Carlos M. Neto, Diogo M. Oliveira, Marta C. Alves, José L. Menezes, Luís F. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Marques, Bruno M. Andrade, Carlos M. Neto, Diogo M. Oliveira, Marta C. Alves, José L. Menezes, Luís F. |
dc.subject.por.fl_str_mv |
Additive manufacturing Selective laser melting Thermo-mechanical modeling Residual stresses |
topic |
Additive manufacturing Selective laser melting Thermo-mechanical modeling Residual stresses |
description |
Additive manufacturing (AM) of metallic components has received large attention in the last decade, particularly the selective laser melting (SLM) process, due to its ability to produce complex and customized parts. However, the high residual stresses generated by the thermal cycles can lead to significant distortions and ultimately to the part cracking. Therefore, several numerical simulation tools have been adopted to predict and mitigate the unwanted part distortion. This study presents a thermo-mechanical model able to simulate the SLM process, considering multitrack within a single powder layer. The finite element model considers the powder-liquid-solid phase changes, i.e. includes melting, solidification and cooling phenomena. The thermal analysis is based on the transient heat conduction problem, considering a volumetric moving heat source. The mechanical analysis is based in an elastoplastic constitutive law, which predicts the residual stresses through the strains induced by the thermal gradients. Both the thermal and the mechanical material properties are assumed as temperature dependent. The main goal of this study is to assess the effect of the scan strategy on the residual stresses generated in the built component. In this context, unidirectional and alternating scan strategies are compared in terms of thermal history and consequent residual stresses generated. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 |
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/10316/101269 http://hdl.handle.net/10316/101269 https://doi.org/10.1016/j.promfg.2020.04.167 |
url |
http://hdl.handle.net/10316/101269 https://doi.org/10.1016/j.promfg.2020.04.167 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
23519789 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799134079698862080 |