Abstract
It was investigated to break A-IX-2 explosive using the submerged cavitation water jet for emptying scrapped ammunitions charged A-IX-2 explosives. The Split Hopkinson pressure bar (SHPB) tests were firstly accomplished for A-IX-2 explosive to obtain its stress-strain mechanical properties. The breaking effect and its mechanism of the submerged cavitation water jet were investigated. The broken A-IX-2 explosives were tested by scanning electron microscope (SEM) to analyze the mesoscopic mode of cavitation water jet breaking A-IX-2 explosive. Finally, the internal temperatures of A-IX-2 explosive during the whole impact process were detected. The results showed that A-IX-2 explosive exhibits strain rate effect. The submerged cavitation water jet is available to use to empty ammunition charged A-IX-2 explosive and the maximum particle size is no more than 3cm. The fragmentation of the explosive by the submerged cavitation water jets is mainly caused by the combined action of micro-jets and shock waves generated by the collapse of cavitation bubbles. The mesoscopic mode is mainly the separation of crystals from binder and aluminum powder. The temperature change of A-IX-2 explosive in the whole process is about 20 °C.
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