| Deformation analysis of a friction stir-welded thin sheet aluminum alloy joint |
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| 作者姓名： | 孙宏宇 周琦 朱军 时孝东 孙智鸣 |
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| 作者单位： | 1. ;2. |
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| 摘 要： | The deformation characteristics of a friction stir welded thin sheet aluminum alloy joint were analyzed via numerical simulations.The simulated results were compared with the experimental results obtained for the deformation of actual welded joints.The results revealed that the deformation of the joint was described by an asymmetric distribution with a large deformation region occurring mainly in the advancing side.This asymmetric deformation was mainly caused by the direct mechanical force applied by the welding tool to the workpiece.Furthermore,the deformation characteristics of the fixed points on both sides of the weld revealed that the deformation of the retreating side fluctuated significantly during the welding process.That is,the retreating side exhibited less welding stability than the advancing side.The stress distribution of the welded joint showed that a high stress region was formed at the end of the weld.In addition,the final stress distribution of the welded joint resulted mainly from the shear stress in the x-y direction.
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| 关 键 词： | friction stir welding numerical simulation DEFORMATION stress distribution |
| 收稿时间： | 2019/9/2 0:00:00 |
Deformation analysis of a friction stir-welded thin sheet aluminum alloy joint |
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| Hongyu Sun,Qi Zhou,Jun Zhu,Xiaodong Shi,Zhiming Sun.Deformation analysis of a friction stir-welded thin sheet aluminum alloy joint[J].China Welding,2020,29(1):56-62. |
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| Authors: | Hongyu Sun Qi Zhou Jun Zhu Xiaodong Shi Zhiming Sun |
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| Affiliation: | 1. Nanjing University of Science and Technology, Nanjing 210094, China;2. Nanjing Institute of Technology, Nanjing 211167, China |
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| Abstract: | The deformation characteristics of a friction stir welded thin sheet aluminum alloy joint were analyzed via numerical simulations. The simulated results were compared with the experimental results obtained for the deformation of actual welded joints. The results revealed that the deformation of the joint was described by an asymmetric distribution with a large deformation region occurring mainly in the advancing side. This asymmetric deformation was mainly caused by the direct mechanical force applied by the welding tool to the workpiece. Furthermore, the deformation characteristics of the fixed points on both sides of the weld revealed that the deformation of the retreating side fluctuated significantly during the welding process. That is, the retreating side exhibited less welding stability than the advancing side. The stress distribution of the welded joint showed that a high stress region was formed at the end of the weld. In addition, the final stress distribution of the welded joint resulted mainly from the shear stress in the x-y direction. |
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| Keywords: | friction stir welding|numerical simulation|deformation|stress distribution |
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