单轴压缩下2种PBX炸药的动态变形损伤及其温升效应  

Deformation with damage and temperature-rise of two types of plastic-bonded explosives under uniaxial compression

作　　者：李涛[1] 傅华[1] 李克武[1] 谷岩[1] 刘仓理[1] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621999

出　　处：《爆炸与冲击》2017年第1期120-125,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(11272294;11272296);中国工程物理研究院科学技术发展重点基金项目(2012A0201007);冲击波物理与爆轰物理重点实验室专项基金项目(2012-专-05)

摘　　要：通过炸药单轴压缩实验,利用高速摄影和高速红外热像仪,对2种典型PBX炸药变形损伤过程和温升效应进行了实时观测。实验结果表明,2种典型PBX炸药的损伤以及温升效应表现出明显差别:低粘结剂含量的炸药表现出明显的脆性特征,材料应力应变曲线中的应变软化阶段是伴随着材料损伤的演化过程,最终的失稳破坏导致样品中贯穿裂纹的形成,非均匀的裂纹分布对应于局部高温带的出现;高粘结剂含量的炸药表现出明显的韧性特征,材料应力应变曲线未出现应变软化现象,变形损伤分布较均匀,但剪切方向出现网络状的温升分布。In the uniaxial compression, deformation with damage and temperature-rise of two types of plastic-bonded explosives were recorded by means of a high-speed camera and a high-speed infrared ra- dio camera. The results show that the damage evolution and the temperature-rise of the two PBXs are obviously different. As for the PBX with a low content of the binder, the brittleness of the material is characteristically obvious, the strain softening of the stress-strain curve is accompanied with a damage evolution, and the crack formation is due to the failure of the sample, where there existed a local temperature band. As for the PBX with a high content of the binder, the toughness of the material is ob- served, the strain softening in the stress-strain curve is absent, and the damage is distributed evenly, with a network temperature-rise in the direction of shear.

关 键 词：固体力学 损伤 温升效应 单轴压缩 塑料粘结炸药 

分 类 号：O346[理学—固体力学]