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Stress intensity factors KI, KII, KIII, Keq, induced at the crack tip of CT specimens subjected to torsional loading

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dc.contributor.authorMartins, Rui F.
dc.contributor.authorFerreira, Luís
dc.contributor.institutionDEMI - Departamento de Engenharia Mecânica e Industrial
dc.contributor.institutionUNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e Industrial
dc.contributor.pblElsevier
dc.date.accessioned2026-01-16T17:02:57Z
dc.date.available2026-01-16T17:02:57Z
dc.date.issued2020
dc.descriptionUIDB/00667/2020
dc.description.abstractThe paper herein presented shows the Stress Intensity Factors (SIF), KI, KII, KIII, and Keq, calculated for Compact Tension (CT) specimens with different thicknesses (B), namely 2.5 mm; 3 mm 5 mm 7.5 mm, and 10 mm, that were subjected to three torsional loads (T): 6 N. m; 7.5 N.m; 9 N.m. Fatigue pre-crack subjected to torsional loading was found to be predominantly under Mode-II loading, and a crack branch was observed. The CT specimens, which were analysed using the Finite Element Method (FEM), were then modelled with two cracks that had grown experimentally from a fatigue pre-crack along two directions (+70ºand -70º), and for several crack lengths (a/L=0; a/L=0.25; a/L=0.50; a/L=0.75; a/L=1.0). Therefore, equivalent SIF, Keq, were calculated from the numerical results of KI, KII and KIII, and a polynomial regression function was determined in function of the thickness of the specimen (B), the crack length (a/L) and the applied torque (T). It was observed that even in the case of a Mode-III loading is applied, Mode I was locally dominant at the branched crack tip, followed by Mode III and Mode II, in that order of relevance. It was also observed that the maximum equivalent SIF occurred at the two outer lateral surfaces of the CT specimens under test, resulting in high crack growth rates in those locations, and minimum at the midplane of the specimen.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent10
dc.format.extent1882578
dc.identifier.doi10.1016/j.prostr.2020.10.010
dc.identifier.issn2452-3216
dc.identifier.otherPURE: 27857169
dc.identifier.otherPURE UUID: f36f5316-1a2c-40dc-878e-037040db0dc7
dc.identifier.otherScopus: 85099830272
dc.identifier.urihttp://hdl.handle.net/10362/199440
dc.identifier.urlhttps://www.scopus.com/pages/publications/85099830272
dc.language.isoeng
dc.peerreviewedyes
dc.subjectCT specimens
dc.subjectFinite element analyses
dc.subjectStress intensity factors
dc.subjectTorsional loading
dc.subjectMechanical Engineering
dc.subjectMechanics of Materials
dc.subjectCivil and Structural Engineering
dc.subjectGeneral Materials Science
dc.titleStress intensity factors KI, KII, KIII, Keq, induced at the crack tip of CT specimens subjected to torsional loadingen
dc.typejournal article
degois.publication.firstPage74
degois.publication.lastPage83
degois.publication.titleProcedia Structural Integrity
degois.publication.volume28
dspace.entity.typePublication
rcaap.rightsopenAccess

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