Overdriven Detonation and Its Application in Shaped Charges

Overdriven detonation (ODD) in high explosives can be generated by Mach reflection of conical detonation waves propagating quasi-steadily in a co-axial double layer cylindrical charge. The inner core of the charge consists of lower detonation velocity explosive with higher detonation velocity explosive for the outer core. The calculated pressures and detonation velocities in the ODD regime are compared with available results in the literature. The application of this technique to design a double layer shaped charge (DLSC) is numerically studied. It was discovered that the use of lower density-lower detonation velocity explosive in the inner core of DLSC can also yield similar results to those obtained with high density lower detonation velocity explosive. By analyzing previous experimental results and comparing with present simulations, it is demonstrated that ordinary shaped charges have some advantages over DLSC under certain conditions.