Initiation of shaped charge into booster devices

Abstract

ABSTRACT In this paper, the initiation capacity of shaped charges against booster devices is carefully examined using both experimental and simulation method. A booster device, which consists of insensitive charges, is investigated by shaped charge jet impact test. The results show that the response degree of the booster device with insensitive charge is detonation reaction. The numerical simulation results of jet initiation into booster devices are also compared with the witness board deformation performance. Furthermore, based on the validated numerical models and the corresponding parameters, a series of numerical simulations are performed to investigate the influence of the explosive types of booster devices, the locations of booster devices and the shell materials of booster devices. By assessing the peak pressure, maximum reaction degree and jet velocity, the influences of the key parameters on the booster device initiation are numerically discussed. The results indicate that, compared with traditional charge, the insensitive charge booster device has low jet initiation insensitivity. As the location of booster device changes, the anti-initiation performance of booster device changes. At the angle of 45°, the minimal initiation performance of the booster device is obtained. It is found that the density and strength of shell material have a slight effect on the jet initiation performance under the given thickness booster device. However, variations in the shell material property are found to impart significant effect on the jet penetration velocity, while variations in the strength impart a significant influence on the low-speed jet.