为研究HTPB推进剂在温度冲击环境条件下的损伤情况,采用单轴定速拉伸声发射(AE)试验,对不同温度冲击周期试验后的HTPB推进剂的损伤特性进行了研究。结果表明:温度冲击后的HTPB推进剂单轴拉伸存在损伤成核、扩展和汇合断裂三个失效阶段;随温度冲击周期的增加,HTPB推进剂释放出的AE累积能量减少,说明在其内部会出现一定损伤,且损伤程度与温度冲击时间呈正相关性;温度冲击时间越长,损伤门槛值提前,越容易出现初始损伤。 In order to study the damage of HTPB propellants under temperature shock environment, the uniaxial constant velocity acoustic emission (AE) test was used to study the damage characteristics of HTPB propellants after different temperature shock cycles. The results show that there are three failure stages of uniaxial stretching of HTPB propellant after temperature shock: the cumulative energy of AE released by HTPB propellant decreases with the increase of temperature shock period, There will be a certain degree of damage, and the degree of damage is positively correlated with the temperature impact time; the longer the temperature impact time, the earlier the damage threshold, the more likely to have initial damage.