Prediction model of multiaxial fatigue life of circular weld of GH4169 casing mounting seat

被引：0
|
作者：
Wu, Zhenhao [1 ]
Liu, Pengfei [1 ]
机构：
[1] AECC Guiyang Engine Design Research Institute, Guiyang,550081, China
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2024年 / 45卷 / 07期
关键词：
Fatigue testing - Forecasting - Mountings - Welding;
D O I：
10.12073/j.hjxb.20230609002
中图分类号：
学科分类号：
摘要：
Aming at multiaxial fatigue life prediction model research on the welded structure of aviation engine casing mounting seat under complex loads, a fatigue life prediction model based on critical plane method is proposed. Firstly, based on the structural characteristics of circular weld of the casing mounting seat, a fatigue biaxial tensile specimen was designed, and biaxial tension fatigue tests were conducted at different load levels and biaxial ratios. Then, based on the critical plane method of Findely and Matake criteria, the fatigue life was predicted separately, and the results showed that the two criteria could not effectively predict the fatigue life of circular weld of the casing mounting seat under different biaxial ratios, by introducing the biaxial ratio γ to adjust the fatigue life prediction model under the Matake criterion, a biaxial tensile fatigue life prediction model was established that can comprehensively consider the effects of different biaxial ratios, and the predicted results are within a 3-fold dispersion band. © 2024 Harbin Research Institute of Welding. All rights reserved.
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页码：101 / 108
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