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Uticaj zaostalih napona na ponašanje zavarenih spojeva i drugih nehomogenih materijala sa prslinama

dc.creatorMeđo, Bojan
dc.creatorRakin, Marko
dc.creatorKolednik, O.
dc.creatorSimha, N K.
dc.creatorFischer, F.D.
dc.date.accessioned2021-03-10T11:03:26Z
dc.date.available2021-03-10T11:03:26Z
dc.date.issued2009
dc.identifier.issn0354-7965
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/1402
dc.description.abstractResidual stresses in many structural components are often produced during the fabrication or bonding processes, due to the cooling from elevated temperatures. Examples for such behavior are: welded and soldered joints, composites, functionally graded materials, coatings, etc. The residual stresses in these materials affect the stress and strain fields in the vicinity of the crack tip, thus making the crack driving force to become different compared to a material without residual stresses. In this paper, the influence of residual stresses is analyzed using FEM software ABAQUS and post processing routine based on the method of configurationally forces. A previous application of this method has included investigations on the influence of mechanical in homogeneities (Young's modulus, yield stress, hardening coefficient) in welded joints of high-strength low-alloyed steels (HSLA). However, these analyses did not include the effect of in homogeneity in thermal properties (coefficient of thermal expansion). The main goal of this paper is to find out the effect of thermally induced residual stresses on the crack driving force in biomaterials and to use the obtained data to improve the integrity and work safety of welded and other inhomogeneous structures.en
dc.description.abstractZaostali naponi u mnogim konstrukcijama nastaju tokom hlađenja u procesu proizvodnje ili spajanja materijala. Primeri su: zavareni i zalemljeni spojevi, kompoziti, materijali sa izraženom anizotropijom, prevlake i dr. Zaostali naponi u slučaju ovakvih materijala utiču na polje napona i deformacija u okolini vrha prsline i dovode do promene vrednosti sile rasta prsline u odnosu na materijal bez zaostalih napona. U ovom radu, uticaj zaostalih napona je analiziran metodom konačnih elemenata, primenom programskog paketa ABAQUS, uz korišćenje postprocesorskog programa razvijenog primenom metode konfiguracionih sila. Ovaj pristup je ranije primenjen na ispitivanje uticaja nehomogenosti mehaničkih osobina (modula elastičnosti, granice tečenja, koeficijenta deformacionog ojačavanja) na spojeve niskolegiranih čelika povišene čvrstoće, ali bez uzimanja u obzir nehomogenosti koeficijenta termičkog širenja materijala. Cilj ovog rada je analiza uticaja termički unetih zaostalih napona na silu rasta prsline u bimaterijalnim spojevima i korišćenje dobijenih rezultata za obezbeđenje integriteta i sigurnog rada zavarenih konstrukcija i struktura sastavljenih od više materijala.sr
dc.publisherDUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
dc.relationinfo:eu-repo/grantAgreement/MESTD/MPN2006-2010/144027/RS//
dc.rightsopenAccess
dc.sourceZavarivanje i zavarene konstrukcije
dc.subjectinhomogeneous structureen
dc.subjectresidual stressesen
dc.subjectcrack driving forceen
dc.subjectnehomogena strukturasr
dc.subjectzaostali naponisr
dc.subjectsila rasta prslinesr
dc.titleThe influence of residual stresses on welded joints and other inhomogeneous materials with cracksen
dc.titleUticaj zaostalih napona na ponašanje zavarenih spojeva i drugih nehomogenih materijala sa prslinamasr
dc.typearticle
dc.rights.licenseARR
dc.citation.epage49
dc.citation.issue2
dc.citation.other54(2): 43-49
dc.citation.spage43
dc.citation.volume54
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_technorep_1402
dc.type.versionpublishedVersion


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