Numerical study on the shock initiation of PBXC03 explosive under the different loading pressure

The shock initiation experiments on the PBXC03 explosives in two different formulations, namely, the medium and the coarse one, are performed to obtained in-situ manganin piezoresistive pressure gauge data at various shock pressure. The loading technique of explosive plane-wave lens and the attenuation technique produced by both air-gap and Al-gap are used in the one-dimensional Lagrangian experimental system. The Numerical simulation on the shock initiation of the two kinds of PBXC03 explosives are performed by using the two-dimensional hydrodynamics software DYNA2D. The computational propagation trajectory and pressure growth process of the shock front agree well with the experimental data, and the computational run-distance-to-detonation points show good agreement with previously published Pop-plot data, which confirms that the mesoscopic reaction rate model used in this paper is reasonable.