An Numerical Investigation on the Effect of the Combination of Cold Expansion and Interference Fitting on Fatigue Life Improvement of a 7075-T6 Aluminum Alloy Single Plate

被引：0

作者：

Huang, Yongjie ^{[1
]}

Guan, Zhidong ^{[1
]}

Li, Zengshan ^{[1
]}

Liu, Faqi ^{[1
]}

He, Yamei ^{[2
]}

Dan, Hu ^{[2
]}

机构：

[1] Beihang Univ, Sch Aeronaut Sci & Engn, Beijing, Peoples R China

[2] AVIC, Chengdu Aircraft Design & Res Inst Inst, Chengdu, Sichuan, Peoples R China

来源：

2017 8TH INTERNATIONAL CONFERENCE ON MECHANICAL AND AEROSPACE ENGINEERING (ICMAE) | 2017年

关键词：

7075-T6 aluminum alloy; cold expansion; interference fitting; combined enhancement; fatigue life; finite element analysis; FASTENER HOLES; CLAMPING FORCE; LAP JOINTS; CRITERIA; PREDICTION; BEHAVIOR;

D O I：

暂无

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Cold expansion and interference fitting both can improve the fatigue life of 7075-T6 aluminum alloy single plates. To study the combination effect of the two techniques on fatigue life improvement, a numerical analysis method was employed to simulate the specimens with different cold expansion and interference fit degrees. Finite element methods were conducted to capture the residual stress, and the Smith-Watson- Topper (SWT) method was used to predict the fatigue life. The simulation results revealed that, compared with single technique enhanced specimens, the combined enhanced specimens of 4% cold expansion and 2% interference fit increase the fatigue life by 12 -38%.

引用

页码：632 / 638

页数：7

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