Investigation of the effect of relative thickness (t(0)/d(0)) on the formability of the AA6061 tubes during free bending process

doi:10.1016/j.ijmecsci.2019.06.006

IMR OpenIR

	Investigation of the effect of relative thickness (t(0)/d(0)) on the formability of the AA6061 tubes during free bending process
	Cheng, Xuan 1,2; Guo, Xunzhong 1,2; Tao, Jie 1,2; Xu, Yong 3,4; Abd El-Aty, Ali 4; Liu, Hai 5
通讯作者	Guo, Xunzhong(guoxunzhong@nuaa.edu.cn) ; Tao, Jie(taojie@nuaa.edu.cn)
	2019-09-01
发表期刊	INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
ISSN	0020-7403
卷号	160 页码:103-113
摘要	3D free bending technology is a fabrication technology that has drawn more and more attention all over the world in recent years. During the free bending process, the relative thickness (t(0)/d(0)) has a great impact on stress-strain distribution and the movement of the neutral layer, thus further affecting the formability and cross-section distortion of the tube. In this study, relative thickness (t(0)/d(0)) were set as 0.033, 0.067, 0.1 and 0.133, respectively. A mechanical analysis model was built to analysis the equivalent stress distribution and the displacement of the strain neutral layer (xi), and the reliability of the theoretical model was verified. The results showed that the equivalent stress is the lowest and its distribution is the most uniform when the relative thickness (t(0)/d(0)) was set as 0.067, which leads to the best formability under all conditions. The peak values of equivalent stress under all conditions appear at the 10 degrees cross-section and the 150 degrees cross-section, respectively, which leads to the thickness of the inner and outer tube changes dramatically. Due to the effect of feeding force which increases the compressive stress of the inner tube and reduces the tensile stress of the outer tube correspondingly, the equivalent stress of the inner tube was higher than the values of the outer tube at the same positions. The displacement of the strain neutral layer (xi) decreases with the increase of the initial thickness of the tube. The lowest values of ellipticity of 3.48% and 2.85% are reached at the two typical cross-sections when the relative thickness is 0.133.
关键词	3D free bending Finite element modeling Formability Relative thickness
资助者	Open Research Funds for the Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering ; Fundamental Research Funds for the Central Universities ; Qing Lan Project
DOI	10.1016/j.ijmecsci.2019.06.006
收录类别	SCI
语种	英语
资助项目	Open Research Funds for the Jiangsu Key Laboratory of Nuclear Energy Equipment Materials Engineering[NJ20170012] ; Fundamental Research Funds for the Central Universities[kfjj20180612] ; Qing Lan Project
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
WOS记录号	WOS:000485209700009
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/135330
专题	中国科学院金属研究所
通讯作者	Guo, Xunzhong; Tao, Jie
作者单位	1.Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 211100, Jiangsu, Peoples R China 2.Nanjing Univ Aeronaut & Astronaut, Jiangsu Key Lab Nucl Energy Equipment Mat Engn, Nanjing 211100, Jiangsu, Peoples R China 3.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano & Heterogeneous Mat Ctr, Nanjing 210094, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 5.Suzhou Vocat Inst Ind Technol, Dept Precis Mfg Engn, Suzhou 215104, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Xuan,Guo, Xunzhong,Tao, Jie,et al. Investigation of the effect of relative thickness (t(0)/d(0)) on the formability of the AA6061 tubes during free bending process[J]. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,2019,160:103-113.
APA	Cheng, Xuan,Guo, Xunzhong,Tao, Jie,Xu, Yong,Abd El-Aty, Ali,&Liu, Hai.(2019).Investigation of the effect of relative thickness (t(0)/d(0)) on the formability of the AA6061 tubes during free bending process.INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,160,103-113.
MLA	Cheng, Xuan,et al."Investigation of the effect of relative thickness (t(0)/d(0)) on the formability of the AA6061 tubes during free bending process".INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 160(2019):103-113.