Experimental and numerical investigations on the influence of cold expansion on low cycle fatigue life of bolt holes in aeroengine superalloy disk at elevated temperature

被引：60
|
作者：
Liu, Hui [1 ]
Hu, Dianyin [1 ,2 ]
Wang, Rongqiao [1 ,2 ]
Wang, Xin [3 ]
Jin, Shengzhe [1 ]
Gu, Yuanxing [4 ]
机构：
[1] Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China
[2] Beijing Key Lab Aeroengine Struct & Strength, Beijing 100191, Peoples R China
[3] Beijing Inst Aeronaut Mat, Aviat Key Lab Adv Corros & Protect Aviat Mat, Beijing 100095, Peoples R China
[4] Aero Engine Corp China, China Gas Turbine Estab, Chengdu 621300, Sichuan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2020年 / 132卷
基金：
中国国家自然科学基金;
关键词：
Cold expansion; Bolt hole; Low cycle fatigue; Nickel based superalloy; Life model; RESIDUAL-STRESS; CRITICAL DISTANCES; EXPANDED HOLES; CRACK-GROWTH; FASTENER; SIMULATION; COMPONENTS; EXPOSURE; MODEL; NOTCH;
D O I：
10.1016/j.ijfatigue.2019.105390
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The direct mandrel cold expansion was introduced to bolt hole locations for a nickel based superalloy compressor disk of an aeroengine in order to improve its fatigue performance at elevated temperature. Low cycle fatigue tests on plate specimens were carried out at 600 degrees C, revealing the average lives of cold expanded samples increased by 2.1-3.5 times. Fracture surfaces were examined using the scanning electron microscope, together with the X-ray diffraction method to measure the residual stresses. Based on three-dimensional finite element analysis, the proposed life model gave satisfactory results with the maximum mean absolute error being 25.7%.
引用
收藏
页数：11
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