Numerical Simulation and Experimental Verification of A New Type of Cylinder-hemisphere Combination Liner Jet Formation and Penetration Performance

Abstract

To improve the penetration ability of hemispheric liner, under the premise of ensuring the advantage of large opening and uniform opening of the hemispheric liner, a new cylinder-hemisphere combination of liner was designed.The numerical simulation of shaped charge penetrator formation in process of cylinder-hemisphere combination of liner and hemispheric liner, and the penetration process of No.45 steel plate was performed by using the numerical simulation software ANSYS/LS-DYNA, and the jet of head and end velocity, stretching length etc. parameters of two shaped charge penetrator and the penetration ability of No.45 steel plate were analyzed. The results show that under the same loading structure, compared with the hemispheric liner, the head speed of shaped penetrator formed by cylinder-hemisphere liner increases by about 16.67% and the penetration capacity of No. 45 steel plate is raised by 16.82%. The deviation of penetration depth and surface opening diameter calculated by numerical simulation is 3.4% and 2.9% respectively, which proves the accuracy of numerical simulation.