聚四氟乙烯基药型罩射流成型凝聚性研究

The jet cohesiveness of polytetrafluoroethylene (PTFE)-based energetic liner is related to the penetration and damage effect of jet. The numerical simulation and experimental verification were carried out to study the jet forming characteristics of PTFE/Ti/W energetic liner. The results show that there is a significant difference between the jets of energetic liner and inert aluminum liner. Due to the lower sound speed of energetic liner, the detached shock wave forms in the liner collapsed by the detonation wave, and the jet is radially diverged during flight. As the density of the liner increases, the jet coherency strengthens. The energetic penetrator continuously reacts and expands during forming. The contour of penetrator gradually becomes blurred and the density decreases with time. The numerical simulation method based on the inert material model can be used accurately to simulate the jet forming in a certain time frame. When the shape change caused by the reaction of penetrator cannot be ignored, the simulated results have certain disparity with the actual results.