摘要
某发动机离心叶轮叶片的排气边多处出现裂纹,通过理化检验和定量分析对裂纹产生原因进行了分析,并估算了叶片的裂纹扩展寿命及其占总寿命的百分比。结果表明:该裂纹为高低周复合疲劳裂纹,叶片在异常振动等大应力作用下产生了疲劳开裂。
The cracks were found in border of centrifugal wheel blade of an engine. The reason of cracks was analyzed by means of physical testing and chemical analysis, quantitative analysis and calculations for crack propagation life and expand total percentage of the propagation life. The results showed that the cracks in blade was high cycle and low cycle composite fatigue eracks, and fatigue cracking occured in blade by large stress of abnormal vibration.
出处
《理化检验（物理分册）》
CAS
2011年第1期60-63,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
离心叶轮
叶片
高低周复合疲劳裂纹
扩展寿命
应力
疲劳开裂
centrifugal wheel
blade
high cycle and low cycle composite fatigue crack
propagation life
stress
fatigue cracking
