Penetration and jet flame effects induced by the interaction between a new energetic penetrator and a simulated shielding charge

Due to the insensitive charge inside the underwater target and the thin-walled flying target in the air, it is difficult for the traditional insensitive penetrator to detonate the low vulnerability charge. The multi-effect penetrator is an effective way to detonate the low vulnerability shielding charge. In order to analyze the damage characteristics of the new energetic penetrator containing Al/PTFE energetic powder penetrating the thin-walled shielding charge shell to the internal low vulnerability injection charge, the material with mechanical properties similar to the injection charge was selected to replace the internal low vulnerability charge, and conduct research on the simulated shielding charge target composed of a new type of energetic penetrator 2A12 shell filled with PMMA. The results indicate that when the internal stress of the simulated charge reaches the maximum tensile strength of 50 MPa, the material fails and fractures, accompanied by radial cracks inside. When the penetration speed of the penetrator is between 100 and 250 m/s, it can be embedded in the aluminum plate. When the penetration speed is greater than 250 m/s, the penetrator can penetrate the aluminum plate. The total time required for the energy generated by piezoelectric ceramics to reach the ignition point is approximately 0.41–2.8 μs. The time from the moment when the counterweight hits the piezoelectric ceramic to the ignition time of the ignition head is 4–7 μs. The delay time for electric ignition head to ignite energetic powder is 365 μs. When the charge of energetic powder reaches 3 g, the overpressure at the nozzle of the energetic penetrating body can reach 1.914 GPa, the overpressure generated by the spray flame on the simulated charge can reach 1.136 GPa, the overpressure generated by the spray flame on the simulated charge can reach 1.136 GPa, and the temperature rise generated by the spray flame can reach 5560 K.