RDX和HMX晶体压制方程的对比研究

分别选取经过不同重结晶工艺处理的RDX和HMX晶体和一种工业级原料颗粒样品进行准静态压制实验，由实验应力／位移曲线获得压制曲线，采用Kawakita和Heckel方程对压制曲线进行拟合。结果表明，拟合所得的常数具有模量倒数量纲，能区分重结晶和原料样品，用作含能晶体品质评价的定量参数。比较两个压制方程的模拟情况，对RDX颗粒两个方程均拟合得很好，而对HMX颗粒存在一定的误差，尤其是Heckel方程误差较大。选取压制过程的形变破碎阶段的数据所得结果其区分度有明显提高，同时两个方程的拟合情况均得到明显改善。对于含能材料颗粒，Kawakita方程更合适。

Comparison Study on the Compaction Equations for RDX and HMX Granule Compression

Two different recrystallized samples and a commercial grade sample are selected to. conduct quasi-static compression tests for RDX and HMX crystalline particles. The compressive stress/density curves are derived from experimental force/displacement curves. The Kawakita and Heckel equations are applied in fitting the compressive curves. The results show that the fitting constants with the reciprocal dimensions of modulus can be used as quantitative parameters to evaluate the mechanical property and crystalline quality of energetic crystalline particles. The fitting results perform excellently to distinguish the recrystallized and commercial grade samples. Comparing the fitting results, both equations fit quite well for RDX, though there is some deviation for HMX, especially by the Heckel equation. Choosing to fit the individual data of deformation and fragmentation stage of the compressing process by two equations, the fitting process and the distinguishability of the fitting parameters are improved greatly, proving that the Kawakita equation is better for the compaction of energetic granules.