Experimental and numerical simulation study of penetration into multi-layer target by shaped charge with different liner materials

To investigate the large penetrated hole's performance of shaped charge against multi-layer target, a titanium alloy liner of shaped charge is proposed. Using the method of experimental and numerical simulation, the jet formation and penetration into multi-layer target are investigated. Difference among the explosion energy conversion, jet tip velocity, jet length, penetration performance, and also the shock wave propagation in the penetrating process are analyzed, for which liner materials include titanium alloy, mild steel and Cu. It is found that compared with the mild steel or Cu liner, the liner material made of titanium alloy has a larger energy of jet whose shape is podgier, the depth as well as diameter of crater is bigger. Although the penetration depth decreases slightly, the size of crater formed in concrete increases obviously and the average penetrated hole diameter on multi-layer increases by 20%.