Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis
Autor(a) principal: | |
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Data de Publicação: | 2011 |
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/11110/429 |
Resumo: | Within the development of motor vehicles, crash safety (e.g. occupant protection, pedestrian protection, low speed damageability), is one of the most important attributes. In order to be able to fulfill the increased requirements in the framework of shorter cycle times and rising pressure to reduce costs, car manufacturers keep intensifying the use of virtual development tools such as those in the domain of Computer Aided Engineering (CAE). For crash simulations, the explicit finite element method (FEM) is applied. The accuracy of the simulation process is highly dependent on the accuracy of the simulation model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, in reality, can vary locally. However, almost always a constant thickness value is defined throughout the entire part due to complexity reasons. On the other hand, for precise fracture analysis within FEM, the correct thickness consideration is one key enabler. Thus, availability of per element thickness information, which does not exist explicitly in the FEM model, can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Even though the thickness is not explicitly available from the FEM model, it can be inferred from the original CAD geometric model through geometric calculations. This paper proposes and compares two thickness estimation algorithms based on ray tracing and nearest neighbour 3D range searches. A systematic quantitative analysis of the accuracy of both algorithms is presented, as well as a thorough identification of particular geometric arrangements under which their accuracy can be compared. These results enable the identification of each technique’s weaknesses and hint towards a new, integrated, approach to the problem that linearly combines the estimates produced by each algorithm. |
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Estimating Local Part Thickness in Midplane Meshes for Finite Element AnalysisAutomotive crash simulationsstructural modellingFEM meshthickness estimationray tracingWithin the development of motor vehicles, crash safety (e.g. occupant protection, pedestrian protection, low speed damageability), is one of the most important attributes. In order to be able to fulfill the increased requirements in the framework of shorter cycle times and rising pressure to reduce costs, car manufacturers keep intensifying the use of virtual development tools such as those in the domain of Computer Aided Engineering (CAE). For crash simulations, the explicit finite element method (FEM) is applied. The accuracy of the simulation process is highly dependent on the accuracy of the simulation model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, in reality, can vary locally. However, almost always a constant thickness value is defined throughout the entire part due to complexity reasons. On the other hand, for precise fracture analysis within FEM, the correct thickness consideration is one key enabler. Thus, availability of per element thickness information, which does not exist explicitly in the FEM model, can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Even though the thickness is not explicitly available from the FEM model, it can be inferred from the original CAD geometric model through geometric calculations. This paper proposes and compares two thickness estimation algorithms based on ray tracing and nearest neighbour 3D range searches. A systematic quantitative analysis of the accuracy of both algorithms is presented, as well as a thorough identification of particular geometric arrangements under which their accuracy can be compared. These results enable the identification of each technique’s weaknesses and hint towards a new, integrated, approach to the problem that linearly combines the estimates produced by each algorithm.We acknowledge the Foundation for Science and Technology, Lisbon, Portugal, through the 3o Quadro Comunit´ario de Apoio and also the POCTI and FEDER programs.INTERNATIONAL JOURNAL OF MATHEMATICS AND COMPUTERS IN SIMULATION2013-12-17T19:04:47Z2011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/11110/429oai:ciencipca.ipca.pt:11110/429enghttp://hdl.handle.net/11110/429metadata only accessinfo:eu-repo/semantics/openAccessFerreira, VânioSantos, Luís PauloFranzen, MarkusO. Ghouati, OmarSimões, Ricardoreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T12:52:01Zoai:ciencipca.ipca.pt:11110/429Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:00:52.394668Repositório 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 |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
title |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
spellingShingle |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis Ferreira, Vânio Automotive crash simulations structural modelling FEM mesh thickness estimation ray tracing |
title_short |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
title_full |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
title_fullStr |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
title_full_unstemmed |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
title_sort |
Estimating Local Part Thickness in Midplane Meshes for Finite Element Analysis |
author |
Ferreira, Vânio |
author_facet |
Ferreira, Vânio Santos, Luís Paulo Franzen, Markus O. Ghouati, Omar Simões, Ricardo |
author_role |
author |
author2 |
Santos, Luís Paulo Franzen, Markus O. Ghouati, Omar Simões, Ricardo |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ferreira, Vânio Santos, Luís Paulo Franzen, Markus O. Ghouati, Omar Simões, Ricardo |
dc.subject.por.fl_str_mv |
Automotive crash simulations structural modelling FEM mesh thickness estimation ray tracing |
topic |
Automotive crash simulations structural modelling FEM mesh thickness estimation ray tracing |
description |
Within the development of motor vehicles, crash safety (e.g. occupant protection, pedestrian protection, low speed damageability), is one of the most important attributes. In order to be able to fulfill the increased requirements in the framework of shorter cycle times and rising pressure to reduce costs, car manufacturers keep intensifying the use of virtual development tools such as those in the domain of Computer Aided Engineering (CAE). For crash simulations, the explicit finite element method (FEM) is applied. The accuracy of the simulation process is highly dependent on the accuracy of the simulation model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, in reality, can vary locally. However, almost always a constant thickness value is defined throughout the entire part due to complexity reasons. On the other hand, for precise fracture analysis within FEM, the correct thickness consideration is one key enabler. Thus, availability of per element thickness information, which does not exist explicitly in the FEM model, can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Even though the thickness is not explicitly available from the FEM model, it can be inferred from the original CAD geometric model through geometric calculations. This paper proposes and compares two thickness estimation algorithms based on ray tracing and nearest neighbour 3D range searches. A systematic quantitative analysis of the accuracy of both algorithms is presented, as well as a thorough identification of particular geometric arrangements under which their accuracy can be compared. These results enable the identification of each technique’s weaknesses and hint towards a new, integrated, approach to the problem that linearly combines the estimates produced by each algorithm. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-01T00:00:00Z 2013-12-17T19:04:47Z |
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/11110/429 oai:ciencipca.ipca.pt:11110/429 |
url |
http://hdl.handle.net/11110/429 |
identifier_str_mv |
oai:ciencipca.ipca.pt:11110/429 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://hdl.handle.net/11110/429 |
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metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
INTERNATIONAL JOURNAL OF MATHEMATICS AND COMPUTERS IN SIMULATION |
publisher.none.fl_str_mv |
INTERNATIONAL JOURNAL OF MATHEMATICS AND COMPUTERS IN SIMULATION |
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 |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799129878867476480 |