J. Phys. IV France 11 (2001) Pr5-203-Pr5-210
Particle simulations as a microscopic approach to a Cosserat continuumS. Diebels, W. Ehlers and T. Michelitsch
Institute of Applied Mechanics (Civil Engineering), University of Stuttgart, 70550 Stuttgart, Germany
Granular materials are characterized by their internal structure which is determined by the shape and size of the individual grains. Even if the ratio of a characteristic length related to a large ensemble of particles (macroscopic scale) and the average diameter of the grains itself (microscopic scale) allow for the application of a continuum theory, the macroscopic response is influenced by the structure on the microscale. Therefore, two natural kinds of theoretical descriptions arise, namely a macroscopic continuum mechanical approach and a microscopic one based on molecular dynamics. The goal of the present contribution is to formulate both kinds of models and to compare the results obtained by the different approaches.
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