000015423 001__ 15423
000015423 005__ 20161115100221.0
000015423 04107 $$aeng
000015423 046__ $$k2016-08-21
000015423 100__ $$aCazacu, Oana
000015423 24500 $$aRole of the matrix plastic flow on the mechanical response of porous solids

000015423 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015423 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015423 506__ $$arestricted
000015423 520__ $$2eng$$aIt is shown that the mechanical response of porous metallic materials is strongly influenced by the particularities of the plastic flow of the matrix. This is demonstrated by comparing the dilatational response of porous solids for which the matrix is described by Tresca, von Mises, and Cazacu et al. [1] yield criterion, respectively. The analytical plastic potentials of the respective porous solids are developed using rigorous limit analysis theorems and upscaling techniques. If the matrix plastic response is governed by Tresca’s yield criterion, the rate of void growth or collapse is much faster than in a porous von Mises solid. However, if the plastic flow of the matrix is described by an odd function that accounts for both slip and twinning at single crystal level, the yield locus of the porous solid does not display any symmetry, with dramatic consequences in terms of the rate of void evolution, and ductility.

000015423 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015423 653__ $$a

000015423 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015423 720__ $$aCazacu, Oana
000015423 8560_ $$ffischerc@itam.cas.cz
000015423 8564_ $$s325676$$uhttps://invenio.itam.cas.cz/record/15423/files/TS.SM13-2.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2692, code TS.SM13-2.02
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000015423 962__ $$r13812
000015423 980__ $$aPAPER