000014296 001__ 14296
000014296 005__ 20161115100147.0
000014296 04107 $$aeng
000014296 046__ $$k2016-08-21
000014296 100__ $$aPouriayevali, Habib
000014296 24500 $$aA study of grain and grain-boundaries based on a gradient crystal-plasticity model

000014296 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014296 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014296 506__ $$arestricted
000014296 520__ $$2eng$$aIn this study, a well-defined finite-deformation gradient crystal-plasticity model which has been proposed by Gurtin [l] is employed and represented with respect to the reference configuration to study size-dependent hardening behavior of a single crystal. A recoverable defect-energy which incorporates geometrically necessary dislocation (GND) density is introduced. The constitutive model is implemented in the finite-element software ABAQUS via a user-defined subroutine (UEL). The primary aim of the current study is an understanding of effect of energetic and dissipative gradient- strengthenings as well as self- and latent-hardening in stress-strain response of a single crystal. Rate and size-dependent responses along with Bauschinger-like behavior under a cyclic simple-shear loading are investigated. Moreover, plastic flows in predefined slip systems and accumulation of GNDs are distinctly observed. This constitutive model is further developed for multicrystals. Penetration of dislocations through soft boundaries and accumulation of GNDs at hard

000014296 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014296 653__ $$a

000014296 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014296 720__ $$aPouriayevali, Habib
000014296 8560_ $$ffischerc@itam.cas.cz
000014296 8564_ $$s182786$$uhttp://invenio.itam.cas.cz/record/14296/files/PO.SM10-1.09.299.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2548, code PO.SM10-1.09.299
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000014296 962__ $$r13812
000014296 980__ $$aPAPER