Fatigue life prediction method based on the features of surface defects

被引：0
|
作者：
Wei D. [1 ]
Chen Y. [1 ]
Wang Y. [1 ]
Gao J. [2 ]
机构：
[1] School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing
[2] Shanghai Engineering Research Center of Commercial Aircraft Engine, Commercial Aircraft Engine Company Limited, Aero Engine Corporation of China, Shanghai
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 01期
关键词：
Fatigue life prediction; Powder metallurgy superalloy; Stress gradient; Surface defect; Turbine disk;
D O I：
10.13224/j.cnki.jasp.2019.01.011
中图分类号：
学科分类号：
摘要：
On the basis of fatigue data of specimen with surface defects, the size parameter of surface defects was proposed, and introduced into the Walker life equation to study the effect of size of surface defects. And the life prediction results of the equation were compared with the calculation results of life prediction method considering the stress gradient. The scatter bands of the results of two models were within ±3, indicating that the method is reliable. Then the equation was used in predicting the fatigue life of powder metallurgy turbine disk and obtaining the influence law of the surface defects with different sizes on the life of turbine disk. Its main engineering significance was that based on the stress characteristics of the dangerous position of turbine disk, the fatigue life with existence of the defect can be acquired. And even if the defects are not detected, it can ensure the safety in service period. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：92 / 98
页数：6
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