Experimental and numerical investigations on fatigue behavior of aluminum alloy 7050-T7451 single lap four-bolted joints

doi:10.1016/j.jmst.2017.09.020

CORC > 金属研究所 > 中国科学院金属研究所

	Experimental and numerical investigations on fatigue behavior of aluminum alloy 7050-T7451 single lap four-bolted joints
	Liu, XM ; Cui, H ; Zhang, SZ ; Liu, HP ; Liu, GF ; Li, SJ
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2018-07-01
卷号	34 期号:7 页码:1205-1213
关键词	7050 aluminum alloy Bolted joint Fatigue behavior Finite element analysis Residual stress
ISSN号	1005-0302
DOI	10.1016/j.jmst.2017.09.020
英文摘要	The fatigue behavior of aluminum alloy 7050-T7451 single lap four-bolted joints was studied by high-frequency fatigue test and finite element (FE) methods. The fatigue test results showed that a better enhancement of fatigue life was achieved for the joints with high-locked bolts by employing the combinations of cold expansion, interference fit, and clamping force. The fractography revealed that fatigue cracks propagated tortuously; more fatigue micro-cliffs, tearing ridges, lamellar structure were observed, and fatigue striation spacing was simultaneously reduced. The evaluation of residual stress conducted by FE methods confirmed the experimental results and locations of fatigue crack initiation. The extension of fatigue lives can be attributed to the evolution of fatigue damage and effect of beneficial compressive residual stresses around the hole, resulting in the delay of crack initiation, crack deflection, and plasticity-induced crack closure. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000434132800018
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80136]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China 2.Oriental Bluesky Titanium Technol Co LTD, Yantai 264005, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, XM,Cui, H,Zhang, SZ,et al. Experimental and numerical investigations on fatigue behavior of aluminum alloy 7050-T7451 single lap four-bolted joints[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(7):1205-1213.
APA	Liu, XM,Cui, H,Zhang, SZ,Liu, HP,Liu, GF,&Li, SJ.(2018).Experimental and numerical investigations on fatigue behavior of aluminum alloy 7050-T7451 single lap four-bolted joints.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(7),1205-1213.
MLA	Liu, XM,et al."Experimental and numerical investigations on fatigue behavior of aluminum alloy 7050-T7451 single lap four-bolted joints".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.7(2018):1205-1213.