Publicação
Estimating local thickness for finite element analysis
| Resumo: | Within the development of motor vehicles, crash safety is one of the most important attributes. To comply with the ever increasing requirements of shorter cycle times and costs reduction, car manufacturers keep intensifying the use of virtual development tools, such as, for crash simulations, the explicit finite element method (FEM). The accuracy of the simulation process is highly dependent on the accuracy of the model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, although most frequently modelled as a constant value, can, in reality, vary locally. Availability of per element thickness information, which does not exist explicitly in the FEM model, is one key enabler and can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Although not explicitly available, thickness 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. |
|---|---|
| Autores principais: | Ferreira, Vânio |
| Outros Autores: | Santos, Luís Paulo; Simões, Ricardo; Franzen, Markus; Ghouati, Omar |
| Assunto: | Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| Ano: | 2010 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1867439644348514304 |
|---|---|
| author | Ferreira, Vânio |
| author2 | Santos, Luís Paulo Simões, Ricardo Franzen, Markus Ghouati, Omar |
| author2_role | author author author author |
| author_facet | Ferreira, Vânio Santos, Luís Paulo Simões, Ricardo Franzen, Markus Ghouati, Omar |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Ferreira, Vânio\"},{\"Person.name\":\"Santos, Luís Paulo\"},{\"Person.name\":\"Simões, Ricardo\"},{\"Person.name\":\"Franzen, Markus\"},{\"Person.name\":\"Ghouati, Omar\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Ferreira, Vânio Santos, Luís Paulo Simões, Ricardo Franzen, Markus Ghouati, Omar |
| datacite.date.Accepted.fl_str_mv | 2010-11-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2011-11-29T13:57:03Z |
| datacite.date.embargoed.fl_str_mv | 2011-11-29T13:57:03Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| datacite.titles.title.fl_str_mv | Estimating local thickness for finite element analysis |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Ferreira, Vânio Santos, Luís Paulo Simões, Ricardo Franzen, Markus Ghouati, Omar |
| dc.date.Accepted.fl_str_mv | 2010-11-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2011-11-29T13:57:03Z |
| dc.date.embargoed.fl_str_mv | 2011-11-29T13:57:03Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/14633 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | World Scientific and Engineering Academy and Society (WSEAS) |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| dc.title.fl_str_mv | Estimating local thickness for finite element analysis |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_5794 |
| description | Within the development of motor vehicles, crash safety is one of the most important attributes. To comply with the ever increasing requirements of shorter cycle times and costs reduction, car manufacturers keep intensifying the use of virtual development tools, such as, for crash simulations, the explicit finite element method (FEM). The accuracy of the simulation process is highly dependent on the accuracy of the model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, although most frequently modelled as a constant value, can, in reality, vary locally. Availability of per element thickness information, which does not exist explicitly in the FEM model, is one key enabler and can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Although not explicitly available, thickness 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. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | conferencePaper |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/b920c57e-c3a2-4638-ac37-5ad4bd6e8a86/download |
| id | rum_2b6fac714fdb296ae39b0d2ade0ded5c |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/14633 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/14633 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Ferreira, Vânio Santos, Luís Paulo Simões, Ricardo Franzen, Markus Ghouati, Omar |
| publishDate | 2010 |
| publisher.none.fl_str_mv | World Scientific and Engineering Academy and Society (WSEAS) |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engWorld Scientific and Engineering Academy and Society (WSEAS)porWithin the development of motor vehicles, crash safety is one of the most important attributes. To comply with the ever increasing requirements of shorter cycle times and costs reduction, car manufacturers keep intensifying the use of virtual development tools, such as, for crash simulations, the explicit finite element method (FEM). The accuracy of the simulation process is highly dependent on the accuracy of the model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, although most frequently modelled as a constant value, can, in reality, vary locally. Availability of per element thickness information, which does not exist explicitly in the FEM model, is one key enabler and can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Although not explicitly available, thickness 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.application/pdfporEstimating local thickness for finite element analysisFerreira, VânioSantos, Luís PauloSimões, RicardoFranzen, MarkusGhouati, OmarHostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISBNIsPartOf97896047424312011-11-29T13:57:03Z2010-112010-11-01T00:00:00ZHandlehttps://hdl.handle.net/1822/14633http://purl.org/coar/access_right/c_abf2open accessAutomotive crash simulationsStructural modellingFEA meshThickness estimationRay tracing3845973 bytesother research producthttp://purl.org/coar/resource_type/c_5794conference paperhttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorium.uminho.pt/bitstreams/b920c57e-c3a2-4638-ac37-5ad4bd6e8a86/download |
| spellingShingle | Estimating local thickness for finite element analysis Ferreira, Vânio Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| status | SINGLETON |
| subject.fl_str_mv | Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| title | Estimating local thickness for finite element analysis |
| title_full | Estimating local thickness for finite element analysis |
| title_fullStr | Estimating local thickness for finite element analysis |
| title_full_unstemmed | Estimating local thickness for finite element analysis |
| title_short | Estimating local thickness for finite element analysis |
| title_sort | Estimating local thickness for finite element analysis |
| topic | Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| topic_facet | Automotive crash simulations Structural modelling FEA mesh Thickness estimation Ray tracing |
| url | https://hdl.handle.net/1822/14633 |
| visible | 1 |