固体炸药的磁驱动准等熵压缩实验研究

较宽压力范围内未反应炸药的本构关系和状态方程对于深入和精确认识压缩波作用下炸药组分间相互作用的力学过程和起爆热点的形成机制具有重要意义。较之冲击压缩,磁驱动准等熵压缩加载(无冲击压缩)是获取较宽压力范围内未反应炸药的动态压缩力学特性更有效的手段。基于大电流产生的电磁力作用原理,在国内率先实现了炸药的磁驱动无冲击压缩实验技术。通过对负载电极、炸药样品参数的优化设计和安装工艺的控制,实现了5 GPa载荷内JO-9159炸药的磁驱动准等熵压缩加载。基于激光位移干涉测量技术和Lagrange数据处理方法,获得了JO-9159炸药的速度响应历史和准等熵压缩线。所得结果与文献数据进行了比较,结果表明,在实验压力范围内,JO-9159炸药的等熵压缩线与PBX9501炸药的等熵压缩线一致。

Magnetically Driven Quasi-Isentropic Compression Experiments of Solid Explosives

It is very important and instructive for us to further and accurately investigate the interaction between constitutes of explosive and formation mechanism of hot spots in explosive initiation, with the constitutive relation and equation of states in wide pressure zone. Compared with shock compression, magnetically driven quasi-isentropic compression (shockless compression) is a more effective method to research the dynamic behavior of un-reacted explosives in wide pressure zone. Based on the working principle of electro-magnetic force produced by large current, the shockless compression technique driven by magnetic force was first realized in domestic. By optimizing the loading electrodes and the parameters of explosive samples, and controlling the installation technology, a pressure of 5 GPa was realized in magnetically driven quasi-isentropic compression experiments. By means of the technique of laser displacement interferometer and the Lagrange data processing method, the particle velocities of the interface between JO-9159 explosive and LiF windows were measured, and from which the experimental isentropes of JO-9159 explosive were obtained. Compared with the results from references, the experimental isentrope of JO-9159 explosive is consistent with that of PBX9501 explosive.