Abstract
The present contribution introduces the modelling of elastic contacts by coupled multibody an boundary element systems. Compared to contacts modelled by impact laws, physically more accurate results can be obtained. Due to the use of boundary element systems, the contact stresses are obtained within the contact calculation.
A new three-dimensional contact element for boundary element systems is developed. The mortar element uses the mixed formulation of boundary element formulations. The algorithm for the iteration of contact states is based on an Dirichlet-to-Neumann algorithm. Herein, both contacting bodies are calculated serially. In the first calculation step one of the contacting bodies represents a rigid obstacle for the other elastic one. The resulting reaction forces on the elastic body are partially transferred on the other one, which is for the second calculation step no longer rigid. As a result, the obstacle is deformed and the next iteration starts. The algorithm converges if the numerical equilibrium in the contact interface is reached.
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Acknowledgements
Thanks to Prof. Klaus Schittkowski from the University of Bayreuth for providing the source code of quadratic programming.
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Zierath, J., Woernle, C. (2013). Contact Modelling in Multibody Systems by Means of a Boundary Element Co-simulation and a Dirichlet-to-Neumann Algorithm. In: Samin, JC., Fisette, P. (eds) Multibody Dynamics. Computational Methods in Applied Sciences, vol 28. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5404-1_2
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