摘要
采用测定单轴定速拉伸条件下标准哑铃形 HTPB推进剂试件声发射 (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
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.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2000年第3期67-70,共4页
Journal of Propulsion Technology
关键词
裂纹扩展
缺陷分析
声发射
HTPB推进剂
Hydroxy terminated polybutadiene propellant
Crack propagation
Defect analysis
Acoustic emission
