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A Novel Specimen Produced by Additive Manufacturing for Pure Plane Strain Fatigue Crack Growth Studies

2021-03-05Artigo científico Acesso aberto
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datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorJesus, Joel de
dc.contributor.authorBorges, Micael
dc.contributor.authorAntunes, Fernando
dc.contributor.authorFerreira, José
dc.contributor.authorReis, Luis
dc.contributor.authorCapela, Carlos
dc.date.accessioned2026-03-13T18:11:33Z
dc.date.available2026-03-13T18:11:33Z
dc.date.issued2021-03-05
dc.description.abstractFatigue crack growth is usually studied using C(T) or M(T) specimens with through-thickness cracks. The objective of the present study is to propose a cylindrical specimen with central crack, produced by additive manufacturing. This geometry allows to have pure plane strain state along the whole crack front, avoiding the complexities associated with corner points, crack shape, and variation of crack closure along crack front. Additionally, this geometry may be used to develop studies in vacuum, avoiding expensive vacuum equipment, since the air is not in contact with the crack front. Cylindrical specimens of Ti6Al4V titanium alloy were produced by Selective Laser Melting and tested at a stress ratio R = 0. Marking with overloads was the solution adopted to measure the length of the internal cracks. The fracture surfaces presented circular crack fronts and the da/dN-DK curves showed a great influence of atmosphere on fatigue crack growth. An average difference of 50% was found between the results in air and vacuum. Therefore, this geometry with internal crack is an interesting alternative to through-thickness geometries.eng
dc.description.sponsorshipThe authors would like to acknowledge the sponsoring under the project no. 028789, financed by the European Regional Development Fund (FEDER), through the Portugal-2020 program (PT2020), under the Regional Operational Program of the Center (CENTRO-01-0145-FEDER-028789) and the Foundation for Science and Technology IP/MCTES through national funds (PIDDAC), and financial support from FCT—Fundação para Ciência e Tecnologia (Portuguese Foundation for Science and Technology) through the project LAETA/IDMEC, project UIDB/50022/2020. The authors also acknowledge program COMPETE—Programa Operacional Factores de Competitividade—and FCT—Fundação para a Ciência e a Tecnologia –, under the project UIDB/00285/2020.
dc.identifier.citationJesus, J.d.; Borges, M.; Antunes, F.; Ferreira, J.; Reis, L.; Capela, C. A Novel Specimen Produced by Additive Manufacturing for Pure Plane Strain Fatigue Crack Growth Studies. Metals 2021, 11, 433. https://doi.org/10.3390/met11030433.
dc.identifier.doi10.3390/met11030433
dc.identifier.eissn2075-4701
dc.identifier.urihttp://hdl.handle.net/10400.8/15868
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationAssociate Laboratory of Energy, Transports and Aeronautics
dc.relationCentre for Mechanical Enginnering, Materials and Processes
dc.relation.hasversionhttps://www.mdpi.com/2075-4701/11/3/433
dc.relation.ispartofMetals
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectcentral crack
dc.subjectplane strain state
dc.subjectvacuum
dc.subjectadditive manufacturing
dc.subjectTi6Al4V
dc.titleA Novel Specimen Produced by Additive Manufacturing for Pure Plane Strain Fatigue Crack Growth Studieseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/50022/2020
oaire.awardNumberUIDB/00285/2020
oaire.awardTitleAssociate Laboratory of Energy, Transports and Aeronautics
oaire.awardTitleCentre for Mechanical Enginnering, Materials and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50022%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00285%2F2020/PT
oaire.citation.endPage18
oaire.citation.issue3
oaire.citation.startPage1
oaire.citation.titleMetals
oaire.citation.volume11
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCapela
person.givenNameCarlos
person.identifier.ciencia-id9B1E-6857-3D6B
person.identifier.orcid0000-0003-3334-4945
person.identifier.ridG-6395-2016
person.identifier.scopus-author-id7801358401
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
relation.isAuthorOfPublication9b079aa3-b79b-4395-b081-1f23d6a17514
relation.isAuthorOfPublication.latestForDiscovery9b079aa3-b79b-4395-b081-1f23d6a17514
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Fatigue crack growth is usually studied using C(T) or M(T) specimens with through-thickness cracks. The objective of the present study is to propose a cylindrical specimen with central crack, produced by additive manufacturing. This geometry allows to have pure plane strain state along the whole crack front, avoiding the complexities associated with corner points, crack shape, and variation of crack closure along crack front. Additionally, this geometry may be used to develop studies in vacuum, avoiding expensive vacuum equipment, since the air is not in contact with the crack front. Cylindrical specimens of Ti6Al4V titanium alloy were produced by Selective Laser Melting and tested at a stress ratio R = 0. Marking with overloads was the solution adopted to measure the length of the internal cracks. The fracture surfaces presented circular crack fronts and the da/dN-DK curves showed a great influence of atmosphere on fatigue crack growth. An average difference of 50% was found between the results in air and vacuum. Therefore, this geometry with internal crack is an interesting alternative to through-thickness geometries.
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