Effects of laser shock peening on fatigue strength of blade leading edge with foreign object damage

被引：0
|
作者：
Lu W. [1 ]
Hu D. [1 ,2 ,3 ]
Yan L. [4 ]
Mao J. [1 ,2 ,3 ]
Guo X. [3 ,5 ]
Shan X. [3 ,5 ]
Zhang Y. [6 ]
Wang R. [2 ,3 ,4 ]
机构：
[1] Research Institute of Areo-Engine, Beihang University, Beijing
[2] Beijing Key Laboratory of Aero-Engine Structure and Strength, Beihang University, Beijing
[3] United Research Center of Mid-Small Aero-Engine, Beijing
[4] School of Energy and Power Engineering, Beihang University, Beijing
[5] AECC Hunan Aviation Powerplant Research Institute, Zhuzhou
[6] School of Electro-Mechanical Engineering, Guangdong University of Technology, Guangzhou
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2024年 / 45卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Blade leading edge; Centrifugal impeller; Fatigue strength; Foreign object damage; K-T figure method; Laser shock peening;
D O I：
10.13675/j.cnki.tjjs.2301003
中图分类号：
学科分类号：
摘要：
In order to study the effects of laser shock peening on the fatigue strength of a centrifugal impeller after foreign object damage, a characteristic simulation specimen reflecting the real leading edge of the blade was designed, combined with the air cannon method to simulate the foreign object damage. By comparing the high-cycle fatigue test results of the simulated specimens with and without laser shock peening, it is found that the fatigue strength of the simulated parts increased by about 37% after laser shock peening. At the same time, numerical simulation of residual stress/strain field after laser shock peening and foreign object damage was carried out. Combined with Kitagawa-Takahashi(K-T)diagram, a fatigue strength prediction method considering foreign object damage and laser shock peening was established. Compared with the experimental results, the average error is 7.3%, which verified the effectiveness of the method. © 2024 Journal of Propulsion Technology. All rights reserved.
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