Berlin 2015 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 4: Granular Matter / Contact Dynamics Part I
DY 4.9: Talk
Monday, March 16, 2015, 11:45–12:00, BH-N 128
Changing friction in ellipsoid packings — •Simon J.A. Weis1, Fabian M. Schaller1,2, Gerd E. Schröder-Turk1, and Matthias Schröter2 — 1Theoretische Physik, FAU Erlangen, Germany — 2Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany
Friction is an important parameter for the stability of granular packings. We examine packings of ellipsoids- and spheres with different friction coefficients and aspect ratios. Interparticle friction is changed by grinding the particles in a rotating drum.
Various packings are prepared and structural properties like Voronoi cell shapes, mean and local contact numbers and packing fractions as well as angle distributions and -correlations are studied by means of Xray-tomography. Data for spheres is compared to numerical data from DEM simulations.
Additionally mechanical properties of packings are measured within a shearcell setup and correlated to the structural results to contribute to a better understanding of stability.