Propagation of an impact shock wave across the interface between confinement and thin explosive has been studied from the viewpoint of the interface location and type of confinement material via numerical analyses. It has been predicted from finite difference analysis based on the Forest-Fire explosive reaction rate model that the detonation at the impact side of the confined explosive requires a much higher level of impact shock as compared with that at the opposite side. Based on one-dimensional stress wave analysis, impacted confinement materials can transfer a higher impact shock to the explosive when they have an intermediate level of impedance, i.e., they increases detonation sensitivity as compared to other materials. However, at the opposite side of the container, the confinement material with a higher impedance reflected a higher impact shock to the explosive from the confinement, indicating that the high-impedance materials foster detonation at such a location.
展开▼
