摘要
采用自制的高能材料动静态变温三轴、单轴压缩试验装置、在熔点以下温度,以及在中等应变速率(2~4/s)和准静态(3×10 ̄(-3)/s)条件下测试了TNT材料三轴、单轴压缩力学性能参数。试验结果表明,TNT材料具有明显的应变率相关和热软化效应。在单轴压缩条件下,TNT材料是脆性破坏,断裂强度小于屈服极限;在三轴压缩条件下,试件有较大的塑性变形。根据试验结果拟合了TNT材料随着加载速率和环境温度变化的本构关系,分析表明该本构关系可以很好地描述材料的应变率、温度效应。
In this paper, an experimental equipment of triaxial compression is used,Measure-ments of domestic TNT have been made in triaxial and uniaxial compression as a function of tem-perature and strain rate. The exporimental results show that there exists a clear temperature andstrain rate dependence in TNT. Under uniaxial compression TNT failed in a brittle mode and thecompression strength is less than the yield strength,and under triaxial compression there obviouslyexists plastic deformation in the sample,By means the experimental results a constitutive equationis determined. Analysis of the results indicates that by the constitutive equation the strain rate de-pendence and thermo-softening effect of TNT are described.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1995年第1期20-27,共8页
Explosion and Shock Waves
关键词
高能材料
TNT
热软化效应
本构关系
炸药
triaxial compression,energetic materials, strain rate effect,thermal softening,constitutive equation