Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Numerical simulation of friction initiation characteristics of armour piercing explosive projectile
| DOI: | 10.11809/bqzbgcxb2024.12.005 |
| Keywords: | thermal explosion; friction heat; numerical simulation; delayed detonation |
| Abstract: | In order to optimize the delayed energy release characteristics of the armour piercing explosive projectile, a temperature rise model for the frictional initiation of the charge was established. Nonlinear finite element analysis software and the FEM SPH algorithm were used to solve the frictional temperature rise of the charge. The frictional temperature rise curves of the charge were obtained when the projectile penetrates the target with different bullet cores and charges. The results show that with a constant core structure, the temperature rise of the charge using tungsten alloy cores is comparable to that of steel cores. However, tungsten alloy cores exhibit a slower rate of temperature rise due to friction and a later ignition time, which is more conducive to achieving the goal of delayed energy release after penetration. The rate of temperature rise due to friction in the charge increases with the thermal conductivity of the explosive; therefore, using explosives with lower thermal conductivity is more beneficial for achieving delayed energy release after penetration. For the case of a double conical projectile core, under conditions of constant cone angle and mass, increasing the diameter of the core facilitates explosive ignition and enhances the potential for delayed energy release after penetration. |
| Issue: | Vol. 45 No. 12 (2024) |
| Published: | 2024-12-30 |
| PDF HTML | |