The artillery chamber pressure is so important a parameter for interior ballistic performance that it has to be measured repeatedly in the course of artillery development, production, acceptance, storage check. When a batch of ammunitions are measured by internal electronic pressure gauge （IEPG） and copper cylinder pressure gauge （CCPG） at the same time, the distribution of IEPG peak values is found to be much larger than that of CCPG ones. The ANSYS model of CCPG was proposed based on the CCPG working principle, and the Johnson-Cook model parameters were optimized ac- cording to the dynamic calibration data. The results shows that when discrepancy occurred with re- spect to the peak pressures measured respectively by IEPG and CCPG, the pressure-change-rate histo- ries of IEPG were different, and the test pressure exerted on the CCPG model was consistent with the copper cylinder deformation obtained in the copper test. The results also show that the difference in peak pressure, captured by IEPG and CCPG in a batch of ammunition chamber pressure measurement at the same time, is due to the influence of different copper cylinder strain rates as a result of different rising rates of the chamber pressure.
Explosion and Shock Waves
artillery chamber pressure
internal electronic pressure gauge
copper cylinder pressure gauge
Johnson-Cook model parameter