被动围压下PBX的冲击动态力学性能

Impact Mechanical Properties of PBX in Passive Confined Pressure

采用铝套筒和TATB基PBX,应用霍普金森压杆被动围压试验方法,研究了PBX在围压下的动态力学响应,得到了该PBX不同应变率下的屈服强度。结果表明,随着应变率的提高,屈服强度有所提高;围压状态下PBX承受的应力远高于无围压状态,变形从脆性向塑性转变,样品未发生明显的破坏。

The dynamic mechanical properties of PBX in confined pressure were studied by passive confined pressure test methods of split hopkinson compressive bar （SHPB）aluminum jacket and PBX based on TATB. The yield strength of PBX under different strain rates were obtained. The results show that with enhancing the strain rate,the yield strength of PBX enhances,PBX bears higher stress than unconfined state,exists visible plastic strain and sam ples does not happen obvious failure.