Validation of Abaqus Explicit – CEL for classes of problems of interest to the U.S. Army

In developing weapon systems for the warfighter, the US Army uses modeling and simulation tools to support the design, test and manufacturing of these systems. One of these tools is Abaqus/Explicit, including the coupled Eulerian-Lagrangian capability CEL. The addition of CEL in version 6.7EF-1 opened the door to a new realm of problems that could not be previously be modeled. With the addition of this new capability came the need for internal validation to establish a level of confidence for the class of problems of interest to the U.S. Army. Over the course of 2 years, several validation problems were modeled and the results compared to either experimental or analytical results. A few of these problems were selected for this paper, including the dynamic tensile extrusion of copper, JWL equation of state of explosive expansion, and compressible inviscid flow in a shock tube. The details of these analyses and comparison to experiment will be discussed along with their practical implications.