A Frictionless Contact Algorithm for Meshless Methods
R. Vignjevic; T. De Vuyst; and J. C. Campbell

Source CMES: Computer Modeling in Engineering & Sciences, Vol. 13, No. 1, pp. 35-48, 2006
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Keywords Smooth particle hydrodynamics, SPH, Contact, Impact
Abstract An approach to the treatment of contact problems involving frictionless sliding and separation under large deformations in meshless methods is proposed. The method is specially suited for non-structured spatial discretisation. The contact conditions are imposed using a contact potential for particles in contact. Inter-penetration is checked as a part of the neighbourhood search. In the case of conventional SPH contact conditions are enforced on the boundary layer 2h thick while in the case of the normalized SPH contact conditions are enforced for the particles lying on the contact surface. The implementation of the penalty based contact algorithm for the explicit time integration scheme is described and the performance of the new contact algorithm is illustrated with a number of examples.
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