The Effect of Tube materials on Metal Jet Initiating the Confined Composition B

摘要

The implementation and validation of a numerical model of the confined Composition B initiated by a metal jet has been studied by AUTODYN-2D. Two different tube thicknesses were used representing strong and weak confinement initiating system. In another contrast, various materials such as Nylon, St45 and Tungsten alloy were adopted to investigate the influence of tube yield stress on the confined explosives initiation behaviour. The results show that, in both cases, the confined explosive is always more likely to be initiated than bare explosive, and the explosive initiation probability increases with the tube thickness and yield stress. The run to detonation generally increases with the increasing lateral confining strength, but decreasing jet tip velocity.