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dc.contributor.authorGurses, Ercan
dc.contributor.authorEl Sayed, Tamer S.
dc.date.accessioned2015-08-03T09:04:02Z
dc.date.available2015-08-03T09:04:02Z
dc.date.issued2011-05
dc.identifier.issn00207683
dc.identifier.doi10.1016/j.ijsolstr.2011.02.013
dc.identifier.urihttp://hdl.handle.net/10754/561762
dc.description.abstractWe present a variational two-phase constitutive model capable of capturing the enhanced rate sensitivity in nanocrystalline (nc) and ultrafine-grained (ufg) fcc metals. The nc/ufg-material consists of a grain interior phase and a grain boundary affected zone (GBAZ). The behavior of the GBAZ is described by a rate-dependent isotropic porous plasticity model, whereas a rate-independent crystal-plasticity model which accounts for the transition from partial dislocation to full dislocation mediated plasticity is employed for the grain interior. The scale bridging from a single grain to a polycrystal is done by a Taylor-type homogenization. It is shown that the enhanced rate sensitivity caused by the grain size refinement is successfully captured by the proposed model. © 2011 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipThis work was fully funded by the KAUST baseline fund.
dc.publisherElsevier BV
dc.subjectConstitutive modeling
dc.subjectCrystal plasticity
dc.subjectGrain size
dc.subjectNanocrystals
dc.subjectRate dependence
dc.titleConstitutive modeling of strain rate effects in nanocrystalline and ultrafine grained polycrystals
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalInternational Journal of Solids and Structures
kaust.personGurses, Ercan
kaust.personEl Sayed, Tamer S.


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