The material is described by a fluid-elasto-plastic theory model, and the impact effects of HVIW are analyzed by SPH meshless method. The numerical simulation results are as follows. With impact velocity increasing, solid penetration, semi fluid penetration and fluid penetration are successively present. In the fluid penetration step, the direct penetration depth will substantially decrease and trend to constant, and the total crater depth will increase very little. Around the projectile front face a static high pressure field will form, accompanied by a dynamic stress wave filed mainly by plastic shock wave. A double wave shape will appear in subsonic fluid penetration, but a strong shock wave, similar to air blast, will appear in hypersonic fluid penetration. However, it attenuates rapidly, with an attenuation index up to 2.5, and the higher impact velocity, the larger attenuation index.

penetration  /  hyper velocity weapon  /  rock  /  weapon effect  /  numerical simulation