Abstract:

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 pres- sure gauge data at various shock pressure. The loading technique of explosive plane-wave lens and the at- tenuation technique produced by both air-gap and Al-gap are used in the one-dimensional Lagrangian ex- perimental system. The Numerical simulation on the shock initiation of the two kinds of PBXC03 explo- sives 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 da- ta, and the computational run-distance-to-detonation points show good agreement with previously pub- lished Pop-plot data, which confirms that the mesoscopic reaction rate model used in this paper is reason- able.

Key words: explosion mechanics, shock initiation, Lagrangian measuring technique, Plastic Bonded Ex- plosive, loading pressure