Experimental study on low cycle fatigue properties of Q345 steel butt joint

doi:10.3969/j.issn.1001-0505.2017.04.018

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	Experimental study on low cycle fatigue properties of Q345 steel butt joint
	Zhou, Yanchun 1; Li, Aiqun 1,2; Fang, Zhao 1; Li, Wanrun 1,3
刊名	Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition)
	2017-07-20
卷号	47 期号:4 页码:738-742
关键词	Butt welding Cracks Energy dissipation Fatigue testing Finite element method Fracture Hardening Hysteresis Hysteresis loops Welds Butt joints Cyclic stress-strain response Energy dissipation capacities Low cycle fatigue life Low cycle fatigue properties Q345 Stress-strain hysteresis loops Weld seam
ISSN号	10010505
DOI	10.3969/j.issn.1001-0505.2017.04.018
英文摘要	By constant amplitude axial low cycle fatigue tests, the fatigue performance of butt weld joints made of Q345 was studied in terms of fatigue life, cyclic stress-strain response characteristics and stress-strain hysteresis loops, and the macro-characteristics of the fracture section were examined. Based on the fatigue test data and finite element analysis, the fatigue life prediction equation of the weld material was derived. The results show that the initial stage of the weld material is characterized by obvious cyclic hardening phenomenon, and the latter stage is slight cyclic softening. As a whole, the material strength and fatigue properties are improved. With the increase of the axial displacement, the stress amplitude increases and the cyclic hardening rate linearly decreases. The hysteresis loop is smooth and full, and the energy dissipation capacity of the material is stable. The fatigue fracture section is divided into crack source zone, crack propagation zone and crack transient fracture zone, and thus it is a typical fatigue fracture section. The obtained fatigue life prediction equation can provide important reference for the fatigue analysis and life evaluation of steel structures made of Q345. © 2017, Editorial Department of Journal of Southeast University. All right reserved.
语种	中文
出版者	Southeast University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114948]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Southeast University, Nanjing; 210096, China; 2.Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China; 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhou, Yanchun,Li, Aiqun,Fang, Zhao,et al. Experimental study on low cycle fatigue properties of Q345 steel butt joint[J]. Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition),2017,47(4):738-742.
APA	Zhou, Yanchun,Li, Aiqun,Fang, Zhao,&Li, Wanrun.(2017).Experimental study on low cycle fatigue properties of Q345 steel butt joint.Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition),47(4),738-742.
MLA	Zhou, Yanchun,et al."Experimental study on low cycle fatigue properties of Q345 steel butt joint".Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) 47.4(2017):738-742.