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Comparison of Numerical Modeling of Penetration of a Capped Projectile with a Windscreen into Special Treatment Steel with Traditional Formulae
Abstract
The penetration of Armor Piercing, Capped (APC) projectiles into Special Treatment Steel is not new [1]. Many years ago the means of calculating the ballistic limit, residual velocity, etc. were based on semi-empirical formulae garnered from actual tests [2]. Major geometric changes in the design of a projectile, cap and windscreen made some difference in the ability of the shell to penetrate armor plate. The purpose of this paper is to attempt to determine a reasonable method to model the mechanical properties of the target material as well as the projectile components to reasonably match the test data and compare with the semi-empirical models. The projectile chosen is a U.S. Navy 14 inch Mark 16 Model 8 projectile depicted in Figure 1. This projectile has been modeled using the Abaqus finite element software. It is believed that the triaxiality of the target material has a great effect on the results [3]. This was compared to the semi-empirical formulae of Lambert and Thompson as well as that of Okun [4]. The modifications to the mechanical properties in the Abaqus model to incorporate triaxiality are discussed. The models were in very good agreement over a fair range of target thicknesses and impact obliquities but not at high obliquities and large target thicknesses.
DOI
10.12783/ballistics2017/16981
10.12783/ballistics2017/16981