摘要
对某含铝炸药进行了准静态和动态压缩实验,得到了不同初始密度的材料在不同应变率下的应力-应变曲线;曲线表明,材料的压缩强度随初始密度及加载应变率的增大而增加;初步建立了材料在不同初始密度、不同应变率下的本构模型,拟合曲线与实验曲线吻合较好,对该炸药不同密度下的力学行为特征和应变率效应得到了较为系统的认识。
Compressive behaviors of a pressed aluminized explosive with different densities （1.5,1.6,1.7 g · cm^-3） were investigated experimentally by split Hopkinson pressure bars （SHPB） and hydraulic testing machine at different strain-rates （ranged from 0.008 s^-1 to 800 s^-1） respectively. Nonlinear stress-strain curves at different strain rates were obtained. The results show that the mechanical behaviors of the aluminized explosive is obviously rate-dependent, and the corresponding failure stresses become higher if the original density or loading strain rates rise. A constitutive relation was established base on the experimental curves.
出处
《含能材料》
EI
CAS
CSCD
2007年第5期460-463,共4页
Chinese Journal of Energetic Materials
基金
国家自然科学基金(10672177)
关键词
固体力学
含铝炸药
本构关系
应变率效应
solid mechanics
aluminized explosive
constitutive model
strain rate effect
