Simulating Granular Material using Nonsmooth Time-Stepping and a Matrix-Free Interior Point Method
Jan Kleinert
Hrsg.: Fraunhofer ITWM, Kaiserslautern
2015, 186 S., num. mostly col. illus. and tab., Softcover
Sprache: Englisch
Kaiserslautern, TU, Diss., 2015
Fraunhofer Verlag
ISBN 978-3-8396-0934-7

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Inhalt
For the product design of earth-moving machinery, a simulation framework for the soil-tool interaction is an appreciated tool. When modelling soil using nonsmooth time stepping methods, a large complementarity problem must be solved per time step. As a consequence, the method is stable for large time steps and potentially fast. Yet when it comes to the prediction of draft forces, state-of-the-art solvers for the complementarity problems fail to deliver the necessary accuracy. This doctoral thesis introduces a specialized Interior Point Method to overcome this issue. In addition, a detailed derivation of the nonsmooth equations of motion is presented.

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