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DY: Fachverband Dynamik und Statistische Physik
DY 40: Posters II
DY 40.18: Poster
Thursday, March 17, 2011, 17:00–19:00, P3
Shearing granular media: from elasticity to compaction — •Jean-Francois Metayer1, Elie Wandersman2, Martin Van Hecke2, and Matthias Schroeter1 — 1MPI for Dynamics and Selforganization, Goettingen, Germany — 2University of Leiden, Netherland
A granular system is able to behave like a solid (a sand pile for example) or like a liquid depending on the deformation imposed on the material.
Using rheometry measurements we investigate the response of a granular bed to an imposed deformation or an imposed stress as a function of its packing fraction. We observed different regimes: elastic, plastic behaviors, flow regime and finally compaction.
The dependence of these regimes on the packing fraction and on the pressure allows us to delineate the phase diagram of granular media.