Eroding interface and improved tetrahedral element algorithms for high-velocity impact computations in three dimensions

Abstract

This paper presents a three-dimensional, eroding interface algorithm which allows Lagrangian computations to be performed for projectile penetration/perforation of thick plates. It also presents an improved tetrahedral element algorithm which provides for very accurate results under mild distortions and allows for continued computations under severe distortions. These algorithms have been incorporated into the EPIC-3 code and examples are presented to illustrate their usefulness.