The EPIC (Elastic Plastic Impact Computation) code is a Lagrangian explicit dynamics code for wave propagation, elastic-plastic flow, material failure, fragmentation and complex interfaces. Its initial development began in the early 1970s and development has continued at SwRI since 2007. It is both a research code and a production code and is especially well suited for high-distortion problems caused by intense impulsive loading due to impact and explosive detonation. It contains finite elements, meshless particles, robust contact interfaces, a wide range of material models and a large material library that contain constants for these models.
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EPIC computation of a tungsten projectile (red) impacting a steel plate. The impact and perforation of the plate produces a complex array of behind armor debris.