摘要
研究了影响聚硫推进剂试件内裂纹扩展的各种因素。对含裂纹的推进剂试件进行了大量的燃烧试验 ,其燃烧过程用 X射线实时成像系统进行了记录 ;并用粘弹性有限元方法计算了试件在燃烧过程中的应力应变状态 ,利用 J积分法对裂纹扩展的可能性进行了预估。理论分析和试验结果均表明 :燃烧室增压速率、裂纹尺寸、边界条件等因素对裂纹的扩展均有较强的影响。
Investigated the various factors which affect the propagating process of the crack in polysulfide propellant sample Combustion experiments were conducted for samples with cracks and the combustion process is measured by the X ray real time radiography system (RTR) The states of stress and strain of the various parts in the sample with cracks were analysed and computed by the viscoelastic finite element method (FEM) The possibility of the crack propagation was predicted by the J integral fracture criterion Theoretical analysis and experimental result show that the chamber pressurization rate,the crack dimensions and the boundary condition have stronger effects on the propagation of the crack These results will have certain value the criterion determination of propellant failure
出处
《推进技术》
EI
CAS
CSCD
北大核心
2000年第3期71-74,共4页
Journal of Propulsion Technology
基金
国家重点实验室资助项目 !(97J560 .1 .3 JB1 4 0 1 )
关键词
聚硫推进剂
裂纹扩展
推进剂燃烧
有限元法
Polysulfide propellant
Crack propagation
Propellant combustion
Finite element method