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| Research of Fretting Fatigue Holistic Life Prediction Method for 2 A12 Aluminum Alloy |
| Received:May 14, 2014 Revised:June 07, 2014 |
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| DOI：10.7643/issn.1672-9242.2014.04.001 |
| KeyWord:2A12 aluminum alloy damage mechanics approach fretting fatigue holistic life |
| Author | Institution |
| CHEN Yue-liang |
Qingdao Branch of Naval Aeronautical Engineering University, Qingdao , China |
| XU Li |
Qingdao Branch of Naval Aeronautical Engineering University, Qingdao , China;Institute of Naval Aviation, Huludao , China |
| ZHANG Yong |
Qingdao Branch of Naval Aeronautical Engineering University, Qingdao , China |
| LIU Xu |
Qingdao Branch of Naval Aeronautical Engineering University, Qingdao , China |
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| Abstract: |
| Objective The holistic life prediction approach for fretting fatigue was proposed for 2A12 aluminum alloy based on initiation life and propagation life. Methods The initiation life was calculated using continuum damage mechanics approach, and the propagation life was calculated using fracture mechanics approach with SIF obtained from XFEM. The prediction life was compared with the test life. Results The results indicated that the damage mechanics approach could consider the effect of the stress triaxiality which reflected the multiaxial stress state property. The model could effectively predict the fretting fatigue holistic life. The crack initiated quickly because of fretting, and the crack propagation began from the near surface, and the propagation life accounted for the main part of holistic life. Conclusion The holistic life prediction model considering initiation life and propagation life was perfect, and the prediction life coincided well with the test life. |
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