COMP．B复合炸药动态力学性能和塑性流动本构关系的研究

利用自制的含能材料动态变温三轴压缩实验装置，采用准静态应变速率（１０－４／ｓ）和中等应变速率（３／ｓ），对国产复合炸药Ｃｏｍｐ．Ｂ进行了三轴压缩实验．测试了Ｃｏｍｐ．Ｂ在不同温度、不同应变速率条件下的杨氏模量Ｅ，泊松比ν和屈服强度Ｙ．实验结果表明，Ｃｏｍｐ．Ｂ具有明显的应变率相关和热软化效应．基于热激活模型，作了适当的改进，根据实验数据建立了含能材料塑性流动模型，分析表明该模型能合理地描述率相关材料的塑性流动，同时考虑了应变率和温度对塑性流动的影响．这些基础研究为含能材料动态力学性能的研究和炸药早爆机理的理论分析提供了依据

A STUDY OF DYNAMIC MECHNICAL RESPONSE AND CONSTITUTIVE MODEL OF ENERGETIC MATERIALS

An experiment equipment of triaxial dynamic compression is used.Measurements of domestic Comp. B have been made in triaxial compression as a function of temperature and strain rate. Young's moduls, yield strenghth and Poisson's ratio have been obtained. The experiment results show that there is clear temperature and strain rate dependence in Comp. B. The Young's modulus and yield strength of Comp. B are larger than those of TNT. Based on the thermally activated theory a plastic flow constitutive model is suggested. The results of analysis indicate that by the constitutive model the strain rate and therm effect of Comp. B are properly described.