000015367 001__ 15367
000015367 005__ 20161115100219.0
000015367 04107 $$aeng
000015367 046__ $$k2016-08-21
000015367 100__ $$aZhu, Linli
000015367 24500 $$aModeling the mechanical properties of FCC polycrystalline metals with hierarchical twins

000015367 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015367 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015367 506__ $$arestricted
000015367 520__ $$2eng$$aExperiments demonstrated that the polycrystalline face-centered cubic (fcc) metals with hierarchical twins performed the higher yield strength with keeping a good elongation. In this work, the extended-dislocation density-based plastic model for constitutive description of nanotwinned fcc metals is applied to simulate the twin spacing and grain size-dependent mechanical properties such as the yield strength and ductility in hierarchically nanotwinned fcc metals. A analytical model on nucleating the deformation twins is also addressed to predict the critical twin spacing in the lowest twin lamellae for generating the subordinate twins. The numerical results show that the global flow stresses are sensitive to the twin spacings in different levels and the grain size. The existence of the hierarchical nanotwins gives rise to the significant enhancement in the strength, and the predicted failure strain decreases with decreasing the twin spacing. The size-dependent critical twin spacing for generating subordinate twins is also studied in details.

000015367 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015367 653__ $$a

000015367 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015367 720__ $$aZhu, Linli
000015367 8560_ $$ffischerc@itam.cas.cz
000015367 8564_ $$s180668$$uhttps://invenio.itam.cas.cz/record/15367/files/TS.SM10-5.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2518, code TS.SM10-5.06
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000015367 962__ $$r13812
000015367 980__ $$aPAPER