Publication Details

Sliding interfaces with contact-impact in large-scale Lagrangian computations

J. O. Hallquist, G. L. Goudreau and D. J. Benson
Journal:Computer Methods in Applied Mechanics and Engineering
Volume: 51, Number: 1-3, page: 107-137, September 1985

    Abstract    
The two- and three-dimensional contact algorithms used in the finite element programs developed at the Lawrence Livermore National Laboratory are described in this paper. We are interested in both static contact and dynamic impact problems and, consequently, have pursued the development of two different algorithms. The first, based on the hydrocode technology of the sixties, is implemented in our two- and three-dimensional explicit finite element codes. The second, a symmetric penalty treatment, is used in our implicit codes and is optional in the explicit codes. The penalty methods are used to obtain solutions to almost all of our structural problems but we find that the hydrocode approach is vastly superior if pressures greatly exceed the yield strength. Examples are provided to show practical applications of both approaches.
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