Dresden 2011 – wissenschaftliches Programm
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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.