摘要
采用单轴压缩实验方法,分析了低温(-40～25℃)和应变率(1/300～1/12 s-1)对HTPB推进剂压缩力学性能的影响,得到了不同温度和应变率条件下推进剂的压缩应力-应变关系。结果表明,推进剂压缩强度和压缩模量随温度的降低和应变率的增加而逐渐增加,且均与应变率具有良好的线性对数关系(lg[σ.k(T)]=a+blg.ε和lg[E.f(T)]=c+dlg.ε),利用该关系式可对推进剂压缩力学性能进行预测。通过双因素方差分析表明,低温和应变率均对推进剂压缩力学性能具有显著影响。其中,低温对压缩模量的影响更加显著,而应变率对压缩强度和压缩应变的影响更加显著。
Compressive mechanical properties were obtained and stress-strain plots were analyzed by means of uniaxial compression tests,which were performed at different strain rate（1/300~1/12 s-1） and temperature（-40~25 ℃） on HTPB propellant.The results show that compression stress and compression modulus increase gradually with decreasing temperature and increasing strain rate,and present linear-log function relation with strain rate（and）,which could be used to predict the compression mechanical properties at wide strain rate.In addition,the results of variance analysis indicate that low temperature has significant effect on compression modulus and compression strain,while strain rate has significant effect on compression stress.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2012年第6期792-794,798,共4页
Journal of Solid Rocket Technology
关键词
HTPB推进剂
低温
应变率
压缩力学性能
HTPB（hydroxy-terminated polybutadiene binder） propellant
low temperature
strain rate
compressive mechanical properties
