Temperature and Residual Stress Field of Flux Bands Constraining Arc Welding T-joint by FEA Based on Hybrid Welding Heat Source Model and Experimental Investigation
QIAO Jisen1,2, RUI Zhenglei1,2, WANG Lei1,2, CHEN Zhenwen1,2
1 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Abstract: Acombined welding heat source model coupled by a flat gaussian and a cylindrical volume heat source was developed to analysis the evolution of welding-induced temperature, residual stress and distortion distribution during the processing of the flux band constraining arc (FBCA) welded T-joint of the Ⅰ-core sandwich. The experiment statistics were obtained by the infrared thermal imager and the three-coordinate instrument. By comparing the results between the experiment and simulation, it is found that the weld cross section, thermal cycle curves, welding isothermal curves and welding distortion are basically consistence between experiment and simulation, which proves the validity and feasibility of the combined welding heat source model on the analysis of this method. At the same time, it is found that the residual stress generated during the welding process is concentrated on the weld and its vicinity, which is much lower than the yield stress of the material. And the residual deformation is acceptable, that the maximum distortion happened on the edge of the panels, according to the experimental measurements. This indicates that the FBCA can effectively control the residual deformation of high-strength steel T-joints, which improves the welding technology for the sandwich panels.
乔及森, 芮正雷, 王磊, 陈振文. 基于组合热源模型焊剂片约束电弧焊T形接头温度场及应力场计算与试验研究[J]. 材料导报, 2020, 34(22): 22142-22147.
QIAO Jisen, RUI Zhenglei, WANG Lei, CHEN Zhenwen. Temperature and Residual Stress Field of Flux Bands Constraining Arc Welding T-joint by FEA Based on Hybrid Welding Heat Source Model and Experimental Investigation. Materials Reports, 2020, 34(22): 22142-22147.
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2020, Vol. 34 
