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Journal of Materials Engineering and Performance

Published in:

17-01-2018

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

Authors: Bing Zhou, Hao Cui, Haibo Liu, Yang Li, Gaofeng Liu, Shujun Li, Shangzhou Zhang

Published in: Journal of Materials Engineering and Performance | Issue 3/2018

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Abstract

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.

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Title: Experimental Investigation and Finite Element Analysis on Fatigue Behavior of Aluminum Alloy 7050 Single-Lap Joints
Authors: Bing Zhou
Hao Cui
Haibo Liu
Yang Li
Gaofeng Liu
Shujun Li
Shangzhou Zhang
Publication date: 17-01-2018
Publisher: Springer US
Published in: Journal of Materials Engineering and Performance / Issue 3/2018
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-018-3137-9

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