The influence of constitutive material models on accumulated plastic strain in finite element weld analyses

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dc.contributor.authorMuránsky, Oen_AU
dc.contributor.authorHamelin, CJen_AU
dc.contributor.authorPatel, VIen_AU
dc.contributor.authorBraham, Cen_AU
dc.date.accessioned2020-03-27T03:15:31Zen_AU
dc.date.available2020-03-27T03:15:31Zen_AU
dc.date.issued2015-09-01en_AU
dc.date.statistics2020-03-20en_AU
dc.description.abstractRecent studies in computational weld mechanics have revealed the importance of the material plasticity model when predicting weld residual stresses. The present work seeks to extend this level of understanding to include the effects of the assumed material annealing behaviour, particularly when modelling multi-pass welds that comprise several thermo-mechanical loading cycles. A series of numerical analyses are performed to examine the variability in predicted residual stress profiles for different material models, using a validated finite element model for a three-pass slot weld in AISI 316LN austenitic steel. The material models consider both the work hardening and annealing assumptions for the chosen material. Model sensitivity is established not only from a weld residual stress perspective, but also from an assessment of the post-weld plastic strain accumulated in the weldment. Predictions are compared with indirect measurements acquired using cross-weld micro-hardness maps taken from benchmark specimens. Sensitivity studies reveal that the choice of annealing behaviour will have a significant impact on plastic flow predictions, which is dependent on the annealing temperature specified. Annealing assumptions will have a varying impact on the weld residual stress predictions, such that the extent of sensitivity is dependent on the plasticity model chosen. In contrast, the choice of plasticity model will have a significant effect on the predicted weld residual stresses, but relatively little effect on predictions of equivalent plastic strain. © 2015 Elsevier Ltd.en_AU
dc.identifier.citationMuránsky, O., Hamelin, C. J., Patel, V. I., Luzin, V., & Braham, C. (2015). The influence of constitutive material models on accumulated plastic strain in finite element weld analyses. International Journal of Solids and Structures, 69, 518-530. doi:10.1016/j.ijsolstr.2015.04.032en_AU
dc.identifier.govdoc9079en_AU
dc.identifier.issn0020-7683en_AU
dc.identifier.journaltitleInternational Journal of Solids and Structuresen_AU
dc.identifier.pagination518-530en_AU
dc.identifier.urihttps://doi.org/10.1016/j.ijsolstr.2015.04.032en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9271en_AU
dc.identifier.volume69en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectResidual stressesen_AU
dc.subjectPlasticsen_AU
dc.subjectAnnealingen_AU
dc.subjectFinite element methoden_AU
dc.subjectPlasticityen_AU
dc.subjectWelded jointsen_AU
dc.titleThe influence of constitutive material models on accumulated plastic strain in finite element weld analysesen_AU
dc.typeJournal Articleen_AU
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