Regensburg 2013 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 33: Poster II
DY 33.22: Poster
Donnerstag, 14. März 2013, 17:00–19:00, Poster C
Fluctuations and yield stress in sheared granular media — •Seyyede Robabeh Moosavi1,2, Jeliazko Jeliazkov3, Michael LeBlanc3, Karin Dahmen3, and Matthias Schröter1 — 1Max-Planck Institute for Dynamics and Self-Organization, Göttingen, Germany — 2Institute for Advanced Studies in Basic Sciences, Zanjan, Iran — 3University of Illinois at Urbana Champaign, Illinois, USA
Slowly sheared granular materials show micro-yielding events before a global fracture. These events develop via slip avalanches with a broad range of sizes. We present experiments on the distribution of avalanche sizes in granular media of different packing fractions. We discussed our results in the context of a recently proposed theoretical model of power law for these statistics [1].
1. K. A. Dahmen, Y. Ben-Zion, J. T. Uhl, Nature Physics, 7, 554-557 (2011).