000015355 001__ 15355
000015355 005__ 20161115100219.0
000015355 04107 $$aeng
000015355 046__ $$k2016-08-21
000015355 100__ $$aNielsen, Kim, Lau
000015355 24500 $$aSize Effects in Void Coalescence

000015355 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015355 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015355 506__ $$arestricted
000015355 520__ $$2eng$$aThe importance of the strain gradients that evolves at the onset of void coalescence at micron-scale is demonstrated through a detailed numerical study. Here, a 3D numerical framework is exploited to grain a parametric understanding of the influence of void size and void spacing, and a direct comparison to a recent extension of the coalescence criterion by Thomason is presented. Taking into account the intrinsic length scales inherited by the ductile failure process shows a clear increase in the level of the average volume stress, perpendicular to the plane of localization, at which void coalescence occurs. Oblate voids are particularly affected by the evolving strain gradients. The increase in stress level predicted in a gradient enhanced matrix material are, however, yet to be properly addressed in existing continuum models as both the Thomason criterion, as-well as the Gurson modeling framework, rest on conventional plasticity theory.

000015355 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015355 653__ $$a

000015355 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015355 720__ $$aNielsen, Kim, Lau
000015355 8560_ $$ffischerc@itam.cas.cz
000015355 8564_ $$s145868$$uhttps://invenio.itam.cas.cz/record/15355/files/TS.SM10-3.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2494, code TS.SM10-3.06
.
000015355 962__ $$r13812
000015355 980__ $$aPAPER