A Finite Element Model to Simulate Defect Formation during Friction Stir Welding

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ID: 107377
2017
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Abstract
In this study, a 3D coupled thermo-mechanical finite element model is developed to predict and analyze the defect formation during friction stir welding based on coupled Eulerian Lagrangian method. The model is validated by comparing the estimated welding temperature, processed zone shape and void size with those obtained experimentally. The results compared indicate that the simulated temperature and the data measured are in good agreement with each other. In addition, the model can predict the plasticized zone shape and the presence of a void in the weld quite accurately. However, the void size is overestimated. The effects of welding parameters and tool pin profile are also analyzed. The results reveal that welding at low welding speed or high tool rotational speed could produce a smaller void. Moreover, compared to a smooth tool pin, a featured tool pin can enhance plastic flow in the weld and achieve defect-free weldment. The results are helpful for the optimization of the welding process and the design of welding tools.
Reference Key
zhu2017ametals Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhu, Zhi;Wang, Min;Zhang, Huijie;Zhang, Xiao;Yu, Tao;Wu, Zhenqiang;
Journal metals
Year 2017
DOI
DOI not found
URL
https://www.mdpi.com/2075-4701/7/7/256
Keywords
Materials of engineering and construction. Mechanics of materials Technology (General) mining engineering. metallurgy

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