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dc.contributor.authorMorin, David
dc.contributor.authorDæhli, Lars Edvard
dc.contributor.authorBørvik, Tore
dc.contributor.authorBenallal, Ahmed
dc.contributor.authorHopperstad, Odd Sture
dc.identifier.citationEuropean Journal of Mechanics. A, Solids. 2019, 74 221-241.nb_NO
dc.description.abstractThis paper investigates two numerical methods for predicting the initiation of ductile failure under moderately and strongly non-proportional loading paths. Two distinct phenomena are considered as indicators for the initiation of ductile failure: (i) the localization of deformation into a narrow band and (ii) the coalescence of microscopic voids. Recent experimental data in the literature from various axisymmetric tension tests on a high-strength steel are used to calibrate and validate the two methods. In the first method, which is based on the imperfection band approach, strain localization analyses are conducted using the deformation history extracted from finite element simulations of the tension tests. In the second method, axisymmetric unit cells are utilized to evaluate the onset of void coalescence using the stress history extracted from the same finite element simulations of the experiments. The various uniaxial tension tests yield different moderately and strongly non-proportional loading paths that are used to evaluate the predictive capabilities of the two methods. The numerical results are further used to discuss the similarities and differences between the two methods. Both the strain localization analyses and the coalescence analyses are found capable of predicting the initiation of failure in the experiments with good accuracy; however, the coalescence analyses are generally in closer agreement to the experiments.nb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.titleNumerical study of ductile failure under non-proportional loadingnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalEuropean Journal of Mechanics. A, Solidsnb_NO
dc.relation.projectNorges forskningsråd: 250553nb_NO
dc.relation.projectNorges forskningsråd: 237885nb_NO
dc.description.localcode© 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 13.11.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
cristin.unitnameInstitutt for konstruksjonsteknikk

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal