Numerical simulation for spigot tests

The safety performane of explosive is investigated by analyzing three responses for spigot test: initiation, ignition and fragmentation. In this paper, the numerical model of spigot test was developed with high sensitive explosive JO-9159 and low sensitive PBXC03. The Ignition and Growth reactive (I and G) model was used to describe initiated progress. The thermal-mechanical coupling method and Arrhenius equation were used to describe ignited temperature. The elements-apart method was used to describe fragmentation of explosive. The calculated critical drop velocity is between 25 m·s^-1 and 28 m·s^-1, which is agreement with experimental results, and interior temperature and fragmentation of explosive were gained.