A life prediction method for size effects on notched fatigue

被引：0
|
作者：
Liu X. [1 ,2 ]
Wang Y.-R. [1 ,2 ]
Tian A.-M. [3 ]
Shi L. [1 ,2 ]
机构：
[1] School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing
[2] Collaborative Innovation Center for Advanced Aero-Engine, Beijing
[3] School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing
来源：
| 1600年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 32期
关键词：
Life prediction; Local stress-strain approach; Mean stress; Notched fatigue; Size effect; Stress gradient;
D O I：
10.13224/j.cnki.jasp.2017.02.022
中图分类号：
学科分类号：
摘要：
By use of the normalized stress distribution at the notch root of a specimen, and based on a notched fatigue life prediction method with consideration of the effects of stress gradient, a life prediction method for fatigue of notched specimen was constructed by taking mean stress, stress gradient and size effect into account with focus on the influence of size effect on the fatigue life of notched specimen. The developed method was verified by use of fatigue test data of TC4 alloy notched specimen, and the prediction results were comparatively analyzed with those of several commonly-used local stress-strain approaches, indicating that those local stress-strain approaches over-conservatively predicted the fatigue life of notched specimen. The developed method can predict the result more precisely with almost all the prediction results within the scatter band of 3 and more than three quarters of the results within the scatter band of 2. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：429 / 437
页数：8
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