Vibration fatigue crack growth life prediction of TC4 titanium alloy by considering the influence of crack shape

被引：0
|
作者：
Yang S. [1 ]
Zhang J.-H. [1 ]
Lin J.-W. [1 ]
Fu X. [1 ]
Kou H.-J. [1 ]
机构：
[1] State Key Laboratory of Engines, Tianjin University, Tianjin
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2016年 / 31卷 / 10期
关键词：
Crack growth; Crack shape; Fatigue life prediction; TC4 titanium alloy; Vibration fatigue;
D O I：
10.13224/j.cnki.jasp.2016.10.007
中图分类号：
学科分类号：
摘要：
Based on the tests about vibration fatigue crack growth of TC4 plate, the relationship between crack growth life and crack length was got. Using the ultra-depth microscope to observe and analyze the crack shape, the crack shape parameter was fitted. The fitted parameter was applied to calculate the stress intensity factor range and predict the crack growth life. Comparing the test results with prediction results, it showed that the crack shape parameter greatly influenced the predicting results. When the parameter was given a constant value, the error between the prediction and tested results was large. However, the fitted crack shape parameter can be used to predicted the crack growth life much more conveniently and accurately. © 2016, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：2353 / 2358
页数：5
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