| 焊接顺序对薄壁八边形管-板焊接接头残余应力的影响（英文） |
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| 引用本文： | 傅定发,周长青,李灿,王冠,李落星. 焊接顺序对薄壁八边形管-板焊接接头残余应力的影响（英文）[J]. 中国有色金属学会会刊, 2014, 24(3): 657-664. DOI: 10.1016/S1003-6326(14)63108-3 |
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| 作者姓名： | 傅定发 周长青 李灿 王冠 李落星 |
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| 作者单位： | [1]湖南大学材料科学与工程学院,长沙410082 [2]湖南大学汽车车身先进设计与制造国家重点实验室,长沙410082 |
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| 基金项目： | Project(61075005)supported by the Fund of State Key Laboratory of Advanced Design and Manufacture for Vehicle Body in Hunan University,China;Project(09JJ1007)supported by Preeminent Youth Fund of Hunan Province,China;Project(51075132)supported by the National Natural Science Foundation of China |
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| 摘 要： | 考虑实际焊接中热-机械的直接耦合效应,通过热-弹塑性有限元法建立三维有限元模型来研究不同焊接顺序对薄壁6061铝合金焊件焊后残余应力分布的影响,采用单道TIG焊接实验来验证模拟结果的准确性;利用九种不同的焊接顺序来研究八边形管和底板之间焊后残余应力的分布状态。结果表明,焊缝及其附近存在的初始残余应力并不影响最终残余应力的分布;选择合理的焊接顺序可以有效降低八边形管-板接头的残余应力。
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| 关 键 词： | 残余应力 焊接顺序 管-板接头 单道焊接 初始残余应力 |
| 收稿时间： | 2013-03-05 |
Effect of welding sequence on residual stress in thin-walled octagonal pipe-plate structure |
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| Ding-fa FU,Chang-qing ZHOU,Can LI,Guan WANG,Luo-xing LI. Effect of welding sequence on residual stress in thin-walled octagonal pipe-plate structure[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(3): 657-664. DOI: 10.1016/S1003-6326(14)63108-3 |
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| Authors: | Ding-fa FU Chang-qing ZHOU Can LI Guan WANG Luo-xing LI |
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| Affiliation: | 1. College of Materials Science and Engineering, Hunan University, Changsha 410082, China; 2. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410082, China) |
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| Abstract: | A three-dimensional finite element approach based on ABAQUS code was developed to investigate the effect of welding sequence on welding residual stress distribution in a thin-walled 6061 aluminum alloy structure. To obtain sound numerical results, the therrno-mechanical behaviour was simulated using a direct-coupled formulation. Nine different simulation sequences were carried out by single-pass TIG welding of an octagonal pipe-plate joint, and the distributions of longitudinal and transverse residual stresses both on the outer and inner surfaces of the pipe were analyzed. The results suggest that the final residual stresses in the weld and its vicinity are not affected by the initial residual stresses of the structure. Selecting a suitable welding sequence can reduce the final residual stress in an octagonal pipe-plate joint. |
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| Keywords: | residual stress welding sequence pipe-plate joint single-pass welding initial residual stress |
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