摘要
在不同温度和应变率下,对双基固体推进剂试件进行了单轴拉伸试验。提出了一种针对双基推进剂屈服值的判断方法,应用一元回归数理统计方法对双基推进剂力学性能数据进行了分析。结果表明,双基推进剂力学性能与温度和应变率具有明显的相关性,在233.15 K下近似为脆性材料,而在288.15 K和323.15 K下呈现明显的塑性流动。针对双基推进剂不同受载情况,提出了与推进剂屈服值相关的强度准则,以便为双基推进剂药柱设计及结构完整性分析奠定基础。
The uniaxial tensile tests about double-base propellant samples were carried out under different environmental tem- perature and strain rate. A judgment method for double-base propellant yield value was put forward, and the mechanical properties of the double-base propellant were analyzed by a regression mathematical statistics method. The results show that the mechanical prop- erties of the double-base propellant is obviously dependent with temperature and strain rate, which approximatly appears as brittle material under 233.15 K,and displays obvious plastic flow under 288.15 K and 323.15 K. According to different loading condi- tions of double-base propellant, the strength criterion that is relevant to propellant yield value was proposed, which lays the founda- tion for design and the structural integrity analysis of double-base propellant grain.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2013年第1期94-97,共4页
Journal of Solid Rocket Technology
基金
总装重点预研项目(20101019)
关键词
双基推进剂
屈服值
粘弹塑性
强度准则
结构完整性
double-base propellant
yield value
viscoelastic-plastic
strength criterion
structural integrity
