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DY: Fachverband Dynamik und Statistische Physik

DY 40: Posters II

DY 40.28: Poster

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

A contact model for the yielding of caked granular materials — •János Török¹, Lothar Brendel¹, Roman Kirsch², and Ulrich Bröckel² — ¹Facultät für Physik, Universität Duisburg-Essen, Duisburg, Deutschland — ²Fachhochschule Trier, Umwelt-Campus Birkenfeld, Deutschland

We present a visco-elastic coupling model between caked spheres, suitable for DEM simulations, which incorporates the different loading mechanisms (tension, shear, bending, torsion) in a combined manner and allows for a derivation of elastic and failure properties on a common basis. In pull, shear, and torsion failure tests with agglomerates of up to 10000 particles, we compare the failure criterion to different approximative variants of it, with respect to accuracy and computational cost. The macroscopic elastic behavior and failure properties of the agglomerates can be derived from the microscopic quantities which allows the scaling of all simulation results. The used method also gives also insight into the relative relevance of the different contact load modes.