临界面法预测微动裂纹萌生特性和微动疲劳寿命  

Predicting Fretting Fatigue Crack Initiation Behavior and Fretting Fatigue Lifetimes Using Critical Plane Approach

作　　者：周文 孙伟明[2] 

机构地区：[1]衢州市特种设备检验中心,浙江衢州324000 [2]浙江工业大学,浙江杭州310032

出　　处：《润滑与密封》2010年第6期108-111,共4页Lubrication Engineering

摘　　要：微动疲劳是造成飞机、船舶、车辆、建筑、核能、海洋工程等失效的主要原因。根据能量的转变提出SSI剪应变能临界面法。以45#钢为例,建立微动桥有限元模型,用SSI剪应变能临界面法对微动桥的微动疲劳裂纹萌生特性和寿命进行预测。通过与试验数据对比证明SSI临界面法用于微动疲劳裂纹萌生特性和寿命预测的可行性。Fretting fatigue is the principal reason for various failures of component,such as for airplane,watercraft,vehicle,nuclear energy,ocean engineering.Based on energy’s conversion,a new SSI shear strain energy approach was brought up and was used to predict crack initiation location,crack initiation orientation of 45 steel in fretting bridge fretting model. Compared with the test results,it is showed that SSI shear strain energy approach is good for predicting fretting fatigue crack initiation location,crack initiation orientation and fretting fatigue life.

关 键 词：微动疲劳 裂纹萌生 微动寿命 SSI剪应变能 

分 类 号：TH117.1[机械工程—机械设计及理论]