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Substrate geometry effect on the strength of repaired plates: Combined XFEM and CZM approach

2022Journal article Restricted access
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dc.contributor.authorDjebbar, S. Ch.
dc.contributor.authorMadani, K.
dc.contributor.authorEl Ajrami, M.
dc.contributor.authorHouari, A.
dc.contributor.authorKaddouri, N.
dc.contributor.authorMokhtari, M.
dc.contributor.authorFeaugas, X.
dc.contributor.authorCampilho, R.D.S.G.
dc.date.accessioned2023-01-26T12:33:44Z
dc.date.embargo2035
dc.date.issued2022
dc.description.abstractAluminum alloys are commonly used in aeronautical applications because of their specific strength and improved corrosion resistance. These structures, during their service, are exposed to various loading cycles, eventually leading to failure at the loci of geometric discontinuities. Repairing by metal or composite patch bonding is widespread to extend the structures’ life by limiting stress concentrations and delaying crack initiation. This work consists of a numerical study, validated by experimental test data, to assess the effect of a central circular notch in an aluminum plate, either reinforced or not by an adhesively bonded composite patch, on the global tensile response of the structure. The constitutive law of the aluminum and adhesive is assumed nonlinear and follows Von Mises equivalent stress flow theory with a hardening variable in incremental form. Damage initiation in the aluminum alloy is modeled by the XFEM (eXtended Finite Element Method), using the maximum principal stress criterion (MAXPS) for damage initiation prediction. Damage evolution is based on the energy approach. The adhesive layer was modeled by CZM (Cohesive Zone Model). A good agreement was found between the experimental results of the tensile curves of the repaired and unrepaired plates with those resulting from numerical modeling. Once the numerical model was validated, several parameters werenumerically studied, namely the shape of the composite patch, the size of the notch, the nature of the adhesive and repair mode by single and double patch, to reduce maximum stress of the damaged area and provide maximum repair efficiency.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ijadhadh.2022.103252pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/21892
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0143749622001683?via%3Dihubpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subject2024-T3 aluminumpt_PT
dc.subjectComposite patchpt_PT
dc.subjectNotchpt_PT
dc.subjectDamagept_PT
dc.subjectCrack propagationpt_PT
dc.subjectXFEMpt_PT
dc.subjectCZMpt_PT
dc.titleSubstrate geometry effect on the strength of repaired plates: Combined XFEM and CZM approachpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage103252pt_PT
oaire.citation.titleInternational Journal of Adhesion and Adhesivespt_PT
oaire.citation.volume119pt_PT
person.familyNameCampilho
person.givenNameRaul Duarte Salgueiral Gomes
person.identifier.ciencia-id0314-43B9-03D4
person.identifier.orcid0000-0003-4167-4434
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4decb370-eb85-4ee1-987f-ec328565ea07
relation.isAuthorOfPublication.latestForDiscovery4decb370-eb85-4ee1-987f-ec328565ea07

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