Penetration of two-layertargets with an outerceramic layer and optimization of their structure

Analytical formulas are obtained for calculating the limiting penetration velocity of two-layer cermet and ceramic-organoplastic targets that take into account the structural characteristics of the target and the physical and mechanical properties of the impactor and target materials. Using these formulas, the ballistic stability of targets were studied, and the possibility of optimizing their structure was shown. Received the results agree qualitatively with available experimental data. The optimal relative thickness of the ceramic layer which provides the maximum penetration velocity was determined in the range of the surface density of the target 30–50 kg/m$^2$ for different substrate materials. It turned out that these velocity values depend weakly on the surface density of the target and are mainly determined by the properties of the substrate material.