HTPB推进剂温度冲击环境下损伤特性的声发射试验  

The Acoustic Emission Testing of Damage Properties of HTPB Solid Propellant Under Temperature Shock

作　　者：刘承武[1] 阳建红[1] 邓凯[1] 陈飞[1] 张晖[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《无损检测》2011年第1期47-49,84,共4页Nondestructive Testing

摘　　要：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。The effects of temperature shock on the damage properties of HTPB composite solid propellant were studied by temperature shock experiments,acoustic emission（AE） and uniaxial tension tests.The results showed that the HTPB propellant shocked by thermal heat for different cycles all existed three failure phases including the damage nucleation,crack expansions and macro crack.The longer the time of the propellant was shocked,the less the AE cumulative energy was released and the more significant the inner damage was caused.The longer the time of the HTPB propellant being shocked,the earlier the damage threshold would appear.

关 键 词：复合固体推进剂 温度冲击 声发射 损伤 

分 类 号：TG115.28[金属学及工艺—物理冶金]