STUDY ON THE FORMING CHARACTERISTIC AND COHERENCY OF PTFE/Al REACTIVE JET

The jet forming characteristic and coherency of polytetrafluoroethylene (PTFE) -based reactive material liner has a significant influence on the penetration behavior of the shaped charge jet. The formation and cohesiveness characteristics of the reactive jets are studied through pulse X-ray experiments and the SPH algorithm. The simulation and experimental results match well. The numerical results show that the cohesiveness of the reactive jet is dramatically related to the liner thickness, cone angle, and explosive type. As the wall thickness of the liner increases from 0.08 CD to 0.16 CD, the coherency and compactness of the reactive jet head first increase and then decrease. For the given main charge of 8701 explosive, the expansion effect of the reactive jet gradually weakens with increasing the liner cone angle. As the detonation pressure of the explosive decreases, the coherency of the reactive jet head is gradually improved at the same cone angle and thickness of the liner. In addition, the simulations demonstrate that the coherency of the reactive jet formed by the shaped charge with a main charge of TNT explosive and a cone angle of 60° is better.