基于声发射测试的钢丝疲劳损伤过程

应用声发射（ＡＥ）技术对制绳钢丝疲劳损伤过程进行动态监测。结果表明疲劳伤普遍产生于钢丝长度方向上的不同部位，所有部位的损伤经过钢丝初始塑性变形阶段之后都同时进入一个长期的慢速发展阶段，在此期间主导裂纹形成，由于主民裂纹以快速扩展方式发展，因而疲劳寿命主要由主裂纹孕育及生成期构成。

FATIGUE DAMAGE OF STEEL WIRE BY ACOUSTIC EMISSION MONITORING

Fatigue damage of steel wire has been monitored using acoustic emission(AE) technique The results show that fatigue damage occurs everywhere on the surface of wire After plastic deformation of wire,all the damage enter a slowly advancing stage,during which the dominant crack initiates Because dominant crack propagates quickly,the fatigue life of wire is mainly determined by the nucleation and initiation of dominant crack