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In this paper, Autodyn-2D hydrocode is used to simulate the penetration process of a small caliber projectile into a ceramic tile with finite thickness backed by a semi-infinite 4340 steel armor. Input data to the code are those used by Reaugh, et al. [1]. These data include six types of ceramic material, projectile material and 4340 semi-infinte steel armor, respectively. The ceramic material types are: Alumina with purity 85 and 96%, respectively, Boron Carbide, Aluminium Nitride, Silicon Carbide and Titanium Diboride. Each tile thickness of a ceramic material type is backed by a 4340 steel semi-infinite armor to form a bi-element target; each target is impacted by a tungesten alloy projectile having a certain velocity in the range from 1300 to 1750 m/s. The main procedures used to simulate the penetration process are introduced. The obtained numerial results of Autodyn-2D are compared with the corresponding experimental measurments of Ref. [1]; good agreement is generally obtained. In addition, samples of the time histories predicted by the hydrocode are presented, together with pertinent analyses and discussions. Finally, It is concluded that the Autodyn-2D hydrocode is a useful tool in designing and evaluating the ballistic efficiency of a bielement target when encountering a certain threat.

NUMERICAL INVESTIGATION OF PROEJECTILE PENETRATION INTO CERAMIC/STEEL TARGETS