HTPB推进剂细观损伤机理的声发射实验研究

采用测定单轴定速拉伸条件下标准哑铃形ＨＴＰＢ推进剂件声发射（ＡＥ）信号的方法，对ＨＴＰＢ复合固体推进剂在载荷作用下细观损伤及其扩展的机理进行了研究。实验结果表明：声发射累计能量对应于细观损伤产生和扩展两个不同阶段，提出了一个描述ＨＴＰＢ复合固体推进剂细观损伤扩展的物理模型，该模型解释了不同拉伸速率下ＨＴＰＢ复合固体推进剂破坏了后出现的不同物理现象。

Acoustic emission experimental study on meso-damage mechanism of HTPB propellant

By way of measuring the Acoustic Emission (AE) signal of HTPB composite solid propellant in condition of uniform speed,the mecro mechanism of meso damage and its propagation of HTPB composite solid propellant were studied.The results of AE test show that AE cumul energy corresponds to two stages of generation and propagation of meso damage of HTPB composite solid propellant.A physical model describing meso damage propagation of HTPB composite solid propellant was put forward and it has explained the mecro mechanism for the phenomenon varied from the strain speed after the destraction of the HTPB composite solid propellant.