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dc.contributor.authorYalçınkaya, Tuncay
dc.contributor.authorÖzdemir, İzzet
dc.contributor.authorFırat, Ali Osman
dc.date.accessioned2020-01-14T07:20:27Z
dc.date.available2020-01-14T07:20:27Z
dc.date.issued2018-05en_US
dc.identifier.issn0094-243X
dc.identifier.urihttps://doi.org/10.1063/1.5035076
dc.identifier.urihttps://hdl.handle.net/11147/7576
dc.description21st International ESAFORM Conference on Material Forming, ESAFORM 2018; Palermo; Italy; 23 April 2018 through 25 April 2018en_US
dc.description.abstractAt grain scale, polycrystalline materials develop heterogeneous plastic deformation fields, localizations and stress concentrations due to variation of grain orientations, geometries and defects. Development of inter-granular stresses due to misorientation are crucial for a range of grain boundary (GB) related failure mechanisms, such as stress corrosion cracking (SCC) and fatigue cracking. Local crystal plasticity finite element modelling of polycrystalline metals at micron scale results in stress jumps at the grain boundaries. Moreover, the concepts such as the transmission of dislocations between grains and strength of the grain boundaries are not included in the modelling. The higher order strain gradient crystal plasticity modelling approaches offer the possibility of defining grain boundary conditions. However, these conditions are mostly not dependent on misorientation of grains and can define only extreme cases. For a proper definition of grain boundary behavior in plasticity, a model for grain boundary behavior should be incorporated into the plasticity framework. In this context, a particular grain boundary model ([l]) is incorporated into a strain gradient crystal plasticity framework ([2]). In a 3-D setting, both bulk and grain boundary models are implemented as user-defined elements in Abaqus. The strain gradient crystal plasticity model works in the bulk elements and considers displacements and plastic slips as degree of freedoms. Interface elements model the plastic slip behavior, yet they do not possess any kind of mechanical cohesive behavior. The physical aspects of grain boundaries and the performance of the model are addressed through numerical examples.en_US
dc.language.isoengen_US
dc.publisherAmerican Institute of Physicsen_US
dc.relation.isversionof10.1063/1.5035076en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPolycrystalline materialsen_US
dc.subjectGrain boundaryen_US
dc.subjectStress corrosion crackingen_US
dc.subjectPlasticityen_US
dc.titleThree dimensional grain boundary modeling in polycrystalline plasticityen_US
dc.typeconferenceObjecten_US
dc.contributor.authorID0000-0003-0211-2316en_US
dc.contributor.iztechauthorÖzdemir, İzzet
dc.relation.journalAIP Conference Proceedingsen_US
dc.contributor.departmentIzmir Institute of Technology. Civil Engineeringen_US
dc.identifier.volume1960en_US
dc.identifier.wosWOS:000432776900275
dc.identifier.scopusSCOPUS:2-s2.0-85047331708
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US


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