Eroded length model for yawed penetrators impacting finite thickness targets at normal and oblique incidence

✍ Scribed by Michael J. Normandia

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 934 KB
• Volume: 23
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(99)00112-8

✦ Synopsis

A

simple expression is derived to estimate the residual length of a yawed, long-rod penetrator impacting finite thickness targets at both normal and oblique incidence. The unique feature of this model is a determination of the different penetration path through the plate which is not simply a line-of-sight thickness. The presence of yaw results in a penetration path which is determined by the magnitude and direction of the penetration velocity vector which is dependent upon the penetrator velocity component along that path. Hence, the material thickness penetrated through the finite target is an explicit, and variable, function of the impact geometry, (obliquity and yaw), impact velocity, and relative penetrator and target properties (densities and strengths). The eroded penetrator length is also dependent on both the penetration path angle and on the velocity component along that path and thus becomes an explicit function of these variables. Two simple expressions are derived to determine the eroded penetrator length and implications for deep target penetration degradation due to yaw are discussed.