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Simulation of crack growth in residual stress fields of pre-fatigued T-welded joints repaired by tungsten inert gas: a 3D approach

2022Journal article Open access
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dc.contributor.authorRamalho, Armando
dc.contributor.authorAntunes, F.V.
dc.contributor.authorFerreira, J.A.M.
dc.date.accessioned2022-06-06T08:07:18Z
dc.date.available2022-06-06T08:07:18Z
dc.date.issued2022
dc.description.abstractIn this article, a three-dimensional finite element model (FEM) is used to predict the crack growth at the weld toe of a pre-fatigued T-joint that was repaired with a remelting technique. The numerical models were developed using the MSC.Marc software. Fatigue life is estimated by integrating the Paris-Erdogan law. The stress intensity factors are obtained by the virtual crack closure technique (VCCT). The T-welded joints, made of S355 steel, are obtained by covered electrode process and pre-cracked by fatigue. These welded joints were repaired by TIG dressing. The stress field generated by this dressing technique was estimated using a FEM model, presented in authors’ previous works. For the crack growth was used the VCCT three-dimensional model recently presented by the authors to predict the effect of overloads. The pre-existence of an elliptical crack at the weld toe, with a depth of 0.5 mm was considered. It is also studied the growth of pre-existing cracks which have been poorly repaired. It was observed that the TIG dressing produce residual compression stress fields on the weld toe that causes a delay in crack growth. The obtained results are compared with experimental ones. The fatigue’s lives obtained by simulations with the numerical model presented in this paper allows to evaluate the application conditions of TIG remelting technique in the repair of pre-cracked welded joints.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationA.L. Ramalho, F. Antunes, J.A.M. Ferreira. Simulation of crack growth in residual stress fields of pre-fatigued T-welded joints repaired by tungsten inert gas: a 3D approach. Procedia Structural Integrity, Volume 41 ,2022, Pages 412-420, https://doi.org/10.1016/j.prostr.2022.05.047.pt_PT
dc.identifier.doi10.1016/j.prostr.2022.05.047pt_PT
dc.identifier.issn2452-3216
dc.identifier.urihttp://hdl.handle.net/10400.11/7988
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier B.V.pt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S2452321622005054pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectRepair of welded jointspt_PT
dc.subjectTIG dressingpt_PT
dc.subjectFatiguept_PT
dc.subjectVirtual crack closure techniquept_PT
dc.titleSimulation of crack growth in residual stress fields of pre-fatigued T-welded joints repaired by tungsten inert gas: a 3D approachpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage420pt_PT
oaire.citation.startPage412pt_PT
oaire.citation.titleProcedia Structural Integritypt_PT
oaire.citation.volume41pt_PT
person.familyNameRamalho
person.givenNameArmando
person.identifier.orcid0000-0003-0500-0459
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication6b97c564-668a-46d8-a91b-ecfae68912c2
relation.isAuthorOfPublication.latestForDiscovery6b97c564-668a-46d8-a91b-ecfae68912c2

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