Study on Damage Characteristics of Different Jets Based on SPH Method

In order to study the damage performance of different jets, the AUTODYN finite element software was used, and the smoothed particle hydrodynamics (SPH) method was adopted, to simulate the formation of jets and penetrating targets of different jets by copper, PTFE and PTFE-Cu materials, and experiments were carried out.The results show that the liner of Cu material form a condensed jet under the effect of detonation wave, while PTFE and PTFE-Cu liner form scattering particle jets. The processes of three kinds of jets penetrating the target plate show that the copper jet head has the lowest speed, deepest penetration depth, and the smallest openings; the head speed of PTFE jet is the highest, the penetration depth is the shallowest and the opening is intermediate. The head speed and penetration depth of the PTFE-Cu jet are intermediate and the openings are the largest. PTFE-Cu jet overcomes the shortcomings of penetration performance of PTFE jet, and its ability of opening is higher than that of the copper jet.