HTPB推进剂非线性粘弹特性的时温等效研究  

Time-Temperature Equivalent Research of Nonlinear Viscoelastic Properties of HTPB Propellant

作　　者：曹翌军 黄卫东[1] 李金飞[1] CAO Yi-jun;HUANG Wei-dong;LI Jin-fei(Department of Aircraft Engineering,Naval Aeronautical Engineering Institute,Yantai 264001,China)

机构地区：[1]海军航空工程学院飞行器工程系,山东烟台264001

出　　处：《推进技术》2018年第7期1643-1649,共7页Journal of Propulsion Technology

基　　金：武器装备预先研究项目(51328050103)

摘　　要：为研究HTPB推进剂非线性粘弹特性的时温等效效应,推导了基于Schapery单积分非线性本构方程的HTPB推进剂时温等效理论表达式,给出了蠕变柔量主曲线的拟合方法。通过不同应力(0.1MPa,0.2MPa,0.3MPa)和不同温度(20℃,40℃,60℃,80℃)条件下HTPB推进剂蠕变试验,得到了参考温度(20℃)下的蠕变柔量主曲线。通过反复加载蠕变试验,分析了载荷变化对蠕变过程的影响。结果表明:不同温度下的蠕变柔量-时间对数曲线在稳定蠕变阶段具有良好的一致性,验证了HTPB推进剂非线性粘弹特性的时温等效效应;0.1MPa,0.2MPa和0.3MPa应力下的蠕变柔量主曲线时间尺度从试验测试的103s分别延伸到了10^(4.27)s,10^(4.17)s和10^(3.91)s;快速的应力释放和恢复加载过程不会影响整个蠕变过程,载荷变化蠕变过程的时温等效效应具有连续性。In order to study the time-temperature equivalent effect of HTPB propellant among the viscoelastic process,the time-temperature equivalent mathematical expressions based on single-integral nonlinear constitutive equation of Schapery was deduced,and the creep compliance master curve fitting method was given. The creep experiments under different stress（0.1 MPa,0.2 MPa,0.3 MPa）and temperature（20℃,40℃,60℃,80℃）levels were conducted to obtain the creep compliance-time logarithmic curve and the creep compliance master curve when the reference temperature was 20℃. The repeated loading creep experiments were conducted to analyze the load change on the influence of creep process. The results show that there is a good consistency on the master curves under the different temperature levels. The main curve time scales in the 0.1 MPa,0.2 MPa and0.3 MPa stress conditions extends from the test time 10^3 s to 10^4.27 s,10^4.17s and 10^3.91s. High-speed stress release and loading process will not affect the whole creep process,there is a good continuity in the time-temperature equivalent effect.

关 键 词：HTPB推进剂 非线性 粘弹特性 时温等效效应 蠕变 

分 类 号：V512.3[航空宇航科学与技术—航空宇航推进理论与工程]