Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/106361
DC FieldValueLanguage
dc.contributor.authorBorges, Micael F.-
dc.contributor.authorNeto, Diogo M.-
dc.contributor.authorAntunes, Fernando V.-
dc.date.accessioned2023-03-31T09:28:18Z-
dc.date.available2023-03-31T09:28:18Z-
dc.date.issued2020-12-04-
dc.identifier.issn1996-1944pt
dc.identifier.urihttps://hdl.handle.net/10316/106361-
dc.description.abstractFatigue crack growth (FCG) has been studied for decades; however, several aspects are still objects of controversy. The objective here is to discuss different issues, using a numerical approach based on crack tip plastic strain, assuming that FCG is driven by crack tip deformation. ΔK was found to control cyclic plastic deformation at the crack tip, while Kmax has no effect. Therefore, alternative mechanisms are required to justify models based on ΔK and Kmax. The analysis of crack tip plastic deformation also showed that there is crack tip damage below crack closure. Therefore, the definition of an effective load range ΔKeff = Kmax - Kopen is not correct, because the portion of load range below opening also contributes to FCG. Below crack closure, damage occurs during unloading while during loading the crack tip deformation is elastic. However, if the maximum load is decreased below the elastic limit, which corresponds to the transition between elastic and elasto-plastic regimes, there is no crack tip damage. Additionally, a significant effect of the crack ligament on crack closure was found in tests with different crack lengths and the same ΔK. Finally, the analysis of FCG after an overload with and without contact of crack flanks showed that the typical variation of da/dN observed is linked to crack closure variations, while the residual stresses ahead of crack tip are not affected by the contact of crack flanks.pt
dc.language.isoengpt
dc.publisherMDPIpt
dc.relationPTDC/CTM-CTM/29101/2017—POCI-01-0145-FEDER- 029101pt
dc.relationUIDB/00285/2020pt
dc.rightsopenAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt
dc.subjectfatigue crack growthpt
dc.subjectconstant amplitude loadingpt
dc.subjectcrack closurept
dc.subjectoverloadpt
dc.titleRevisiting Classical Issues of Fatigue Crack Growth Using a Non-Linear Approachpt
dc.typearticle-
degois.publication.firstPage5544pt
degois.publication.issue23pt
degois.publication.titleMaterialspt
dc.peerreviewedyespt
dc.identifier.doi10.3390/ma13235544pt
degois.publication.volume13pt
dc.date.embargo2020-12-04*
uc.date.periodoEmbargo0pt
item.grantfulltextopen-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.openairetypearticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextCom Texto completo-
crisitem.author.researchunitCEMMPRE - Centre for Mechanical Engineering, Materials and Processes-
crisitem.author.orcid0000-0002-0336-4729-
Appears in Collections:I&D CEMMPRE - Artigos em Revistas Internacionais
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