Experimental Investigation and Finite Element Analysis on Fatigue Behavior of Aluminum Alloy 7050 Single-Lap Joints

被引：14
作者：
Zhou, Bing [1 ]
Cui, Hao [2 ]
Liu, Haibo [2 ]
Li, Yang [2 ]
Liu, Gaofeng [3 ]
Li, Shujun [4 ]
Zhang, Shangzhou [2 ]
机构：
[1] Yantai Univ, Sch Mech & Automobile Engn, Yantai 264005, Peoples R China
[2] Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China
[3] Oriental Bluesky Titanium Technol Co LTD, Yantai 264005, Peoples R China
[4] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2018年 / 27卷 / 03期
关键词：
7050 aluminum alloy; cold expansion; fatigue; finite element analysis; riveted joint; INTERFERENCE-FIT; COLD EXPANSION; AL; 2024-T3; RESIDUAL-STRESS; FASTENER HOLE; CRACK-GROWTH; SHEAR; PERFORMANCE; PREDICTION; LIFE;
D O I：
10.1007/s11665-018-3137-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fatigue behavior of single-lap four-riveted aluminum alloy 7050 joints was investigated by using high-frequency fatigue test and scanning electron microscope (SEM). Stress distributions obtained by finite element (FE) analysis help explain the fatigue performance. The fatigue test results showed that the fatigue lives of the joints depend on cold expansion and applied cyclic loads. FE analysis and fractography indicated that the improved fatigue lives can be attributed to the reduction in maximum stress and evolution of fatigue damage at the critical location. The beneficial effects of strengthening techniques result in tearing ridges or lamellar structure on fracture surface, decrease in fatigue striations spacing, delay of fatigue crack initiation, crack deflection in fatigue crack propagation and plasticity-induced crack closure.
引用
收藏
页码：915 / 923
页数：9
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