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DY: Fachverband Dynamik und Statistische Physik

DY 40: Posters II

DY 40.29: Poster

Donnerstag, 17. März 2011, 17:00–19:00, P3

Anisotropic elasticity in a frictional packing of disks — •Jens Boberski¹, Reza Shaebani¹, Tamás Unger², and Dietrich Wolf¹ — ¹Fakultät für Physik, Universität Duisburg-Essen, 47048 Duisburg, Germany — ²Institute of Physics, Budapest University of Technology and Economics, 1111 Budapest, Hungary

Granular materials, when sheared, can evolve anisotropies due to the opening of contacts in a preferred direction. The opening of contacts leads to a change of the fabric and thus in the constitutive relation. The evolution of the contact distribution as well as the distribution of sliding contacts is predicted by assuming affine displacements of the disks. In a mean-field like approach the three elastic constants (bulk, shear and anisotropy moduli) are obtained by averaging over these distributions while assuming affinity. These predicted moduli are strain dependent and compared with results of DEM Simulations.