000014908 001__ 14908
000014908 005__ 20161115100205.0
000014908 04107 $$aeng
000014908 046__ $$k2016-08-21
000014908 100__ $$aHenann, David
000014908 24500 $$aSize dependence of the yield threshold in dense granular materials

000014908 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014908 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014908 506__ $$arestricted
000014908 520__ $$2eng$$aYield of granular materials is typically modeled by local, pressure-dependent criteria, such as the Drucker-Prager condition, in which yield at a point is assessed based only on the stress. However, nonlocal effects lead to phenomena that cannot be captured with local yield conditions. For example, flows of thin layers of grains down an inclined surface exhibit a size effect whereby thinner layers require more tilt to begin flowing, and hence, sufficiently thin layers will not flow, even when the stress in the layer exceeds the yield condition. Recently, a new continuum model – the nonlocal granular fluidity (NGF) model – was successfully used to predict steady granular flow fields in a variety of flow configurations. In this work, we show that the NGF model is also capable of quantitatively describing the size-dependent strengthening of thin granular bodies – both in flow down an incline and in linear shear with gravity.

000014908 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014908 653__ $$a

000014908 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014908 720__ $$aHenann, David
000014908 8560_ $$ffischerc@itam.cas.cz
000014908 8564_ $$s103498$$uhttps://invenio.itam.cas.cz/record/14908/files/TS.FS08-2.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 3363, code TS.FS08-2.06
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000014908 962__ $$r13812
000014908 980__ $$aPAPER