Summary
In this work different models for the simulation of granular material are investigated. Due to the fact that a detailed simulation considering complex shapes of the bodies is very time consuming, methods from molecular dynamics (MD) are used. By means of granular matter simulations large systems like bulk solids, silicic or sand e.g. in silos, or other systems like carriage systems can be investigated. The MD method is combined here with ideas from multibody systems, so that it is possible to determine the collisions and the motion of differently shaped bodies. Here, particles are modeled as rigid bodies, where the interaction is described by means of elastic contact forces. The particles considered are convex or non-convex three-dimensional polyhedra.
After neighboring body pairs are found, the very time consuming collision detection for polygonal bodies can be accomplished. In order to check whether there is a collision between two neighboring body pairs, it has to be checked, whether there is a vertex of one body inside the other body. It will be focused also on the calculation of the contact forces in normal and tangential direction.
Research Project B7 “Hybrid Multibody Simulations of Poured Particles”
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Eberhard, P., Muth, B. (2006). Dynamics of Poured Polyhedra of Different Shape. In: Helmig, R., Mielke, A., Wohlmuth, B.I. (eds) Multifield Problems in Solid and Fluid Mechanics. Lecture Notes in Applied and Computational Mechanics, vol 28. Springer, Berlin, Heidelberg . https://doi.org/10.1007/978-3-540-34961-7_8
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