Effect of shock–wave loading conditions on the behavior of a petn–based plastic explosive

The paper reports results of investigation of the spallation and initiation of an explosive transformation in the plastic explosive formulation TP–83 under shock–wave loading. In the first case, specimens 20 mm thick were impacted by explosive driven steel plates 1.0 and 1.6 mm thick at velocities of 120–420 m/sec, and in the second case, the impact velocity was 430–580 m/sec. In addition, in the second case, specimens 5 mm thick were impacted by copper plates with a thickness of 0.10–0.28 mm accelerated to velocities of 590–1250 m/sec. The loading conditions were calculated in an elastoplastic formulation. The relationships between the loads leading to shock–induced spallation and explosive transformation of the explosive formulation are obtained and represented analytically.