INCORPORATION OF AN SPH OPTION INTO THE EPIC CODE FOR A WIDE-RANGE OF HIGH-VELOCITY IMPACT COMPUTATIONS

This paper describes and demonstrates how a Smooth Particle Hydrodynamics (SPH) algorithm can be incorporated into a standard Lagrangian code such as EPIC. The SPH technique is also Lagrangian, but it has variable nodal connectivity and can handle severe distortions in a manner comparable with Eulerian codes. Included is the SPH algorithm for axisymmetric geometry, example problems using only the SPH option, and example problems where the SPH grid is coupled to the standard EPIC grid. The coupling techniques allow for attachment, sliding, and automatic generation of SPH nodes.