000015363 001__ 15363
000015363 005__ 20161115100219.0
000015363 04107 $$aeng
000015363 046__ $$k2016-08-21
000015363 100__ $$aPetryk, Henryk
000015363 24500 $$aA minimal gradient-enhancement of crystal plasticity theory

000015363 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015363 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015363 506__ $$arestricted
000015363 520__ $$2eng$$aA minimal gradient-enhancement of the continuum multislip theory of crystal plasticity for incorporating size effects is proposed. The concept of the tensorial density of geometrically necessary dislocations generated by in-plane slip gradients is combined with the classical Taylor formula for a flow stress. The derived internal length scale is expressed through standard parameters so that no extra assumption is needed to define a characteristic length. It is shown that this internal length scale is related to the mean free path of dislocations and hence possesses physical interpretation which is frequently missing in other gradient-plasticity models. While the resulting gradientenhancement is extremely simple and involves no adjustable length-scale parameter, its verification by 3D finite element simulations of spherical indentation in a Cu single crystal shows good agreement with the experimentally observable size effect.

000015363 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015363 653__ $$a

000015363 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015363 720__ $$aPetryk, Henryk
000015363 8560_ $$ffischerc@itam.cas.cz
000015363 8564_ $$s135540$$uhttps://invenio.itam.cas.cz/record/15363/files/TS.SM10-5.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2510, code TS.SM10-5.02
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000015363 962__ $$r13812
000015363 980__ $$aPAPER