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dc.contributor.authorYu, Haiyang
dc.contributor.authorOlsen, Jim Stian
dc.contributor.authorOlden, Vigdis
dc.contributor.authorAlvaro, Antonio
dc.contributor.authorHe, Jianying
dc.contributor.authorZhang, Zhiliang
dc.date.accessioned2019-05-06T13:23:19Z
dc.date.available2019-05-06T13:23:19Z
dc.date.created2016-08-30T10:15:00Z
dc.date.issued2016
dc.identifier.citationEngineering Fracture Mechanics. 2016, 166 23-42.nb_NO
dc.identifier.issn0013-7944
dc.identifier.urihttp://hdl.handle.net/11250/2596646
dc.description.abstractThe convergence problem during the cohesive zone modelling of hydrogen embrittlement in constant displacement scenario is attributed to the numerical instability which is studied analytically in the present work. The property of numerical stability is directly associated with the number of solutions for the controlling equations from the failure initiation point. It is shown that all the cases with a non-unique solution are numerically unstable thereby having convergence problem. Linear elastic and elasto-plastic material models are considered in the derivation, and the convergence properties for both models are proved essentially the same. The viscous regularization proposed by Gao and Bower [1] proves effective in solving the convergence problem with good accuracy under constant displacement, provided that the viscosity is small enough. This is further supported by a pipeline engineering case study where the viscosity regularized cohesive zone approach is applied to the hydrogen embrittlement simulation. The stabilizing mechanism of the viscous regularization is attributed to its capacity to enforce a single solution by modifying the controlling equations. The influence of viscous regularization on symmetry modelling is also discussed.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.titleViscous regularization for cohesive zone modelling under constant displacement: an application to hydrogen embrittlement simulationnb_NO
dc.title.alternativeViscous regularization for cohesive zone modelling under constant displacement: an application to hydrogen embrittlement simulationnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber23-42nb_NO
dc.source.volume166nb_NO
dc.source.journalEngineering Fracture Mechanicsnb_NO
dc.identifier.doi10.1016/j.engfracmech.2016.08.019
dc.identifier.cristin1376522
dc.relation.projectNorges forskningsråd: 234130nb_NO
dc.description.localcodeThis article will not be available due to copyright restrictions (c) 2016 by Elseviernb_NO
cristin.unitcode194,64,45,0
cristin.unitnameInstitutt for konstruksjonsteknikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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