From the viewpoint of macroscopic phenomena in heat transfer, a combined “double-ellipsoid + linearly-increased peak value cylinder” volumetric heat source distribution mode was proposed according to the characteristics of laser + GMAW hybrid heat source welding process. A finite element model of laser + GMAW hybrid heat source welding process was established. The temperature distribution, and the size of the weld cross-section were numerically calculated. It can be observed that the calculated results were in good agreement with the experimental results, which proves the rationality and applicability of the combined volumetric heat source model. And then, the calculated temperature field was utilized for the numerical modeling and comparison of the welding deformation and residual stress between GMAW and laser + GMAW hybrid welding process. The results shown that the heat input, weld width, welding deformation and high residual stress region of laser + GMAW hybrid welding were all much smaller than that of GMAW with the identical weld pool depth. The research confirmed the advantages of laser + GMAW hybrid welding, and provided basic theoretical data for the optimization of process parameters.
WU Xiangyang
,
SU Hao
,
SUN Yan
,
CHEN Ji
,
WU Chuanong
. Thermal-mechanical coupled numerical analysis of laser + GMAW hybrid heat source welding process[J]. Transactions of The China Welding Institution, 2021
, 42(1)
: 91
-96
.
DOI: 10.12073/j.hjxb.20200708001
[1] Steen W M, Eboo M. Arc augmented laser welding[J]. Metal Construction, 1979, 11(7): 332-335.
[2] Steen W M. Arc augmented laser processing of materials[J]. Applied Physics, 1980, 51(11): 5636-5641.
[3] Dilthey U, Wieschemann A, Lueder F. Technical and economical advantages by synergies in laser arc hybrid welding[J]. Welding in the World, 1999, 43(4): 141-152.
[4] Shida T, Hirokawa M, Sato S. CO2 laser welding of aluminum alloys-welding of aluminum alloys using CO2 laser beam in combination with MIG arc[J]. Welding Research Abroad, 1997, 43(5): 36-41.
[5] Steen W M. Arc augmented laser welding-process variables, structure and properties[C]//The Joining of Metals, Spring Residential Conference, Coventry, 1981.
[6] Rejc J, Troyanova K, Iorio L, et al. Residual stresses prediction on clad pipeline girth welds through numerical simulation[J]. Procedia Manufacturing, 2019, 37: 605-612.
[7] Lu Y, Zhu S, Zhao Z, et al. Numerical simulation of residual stresses in aluminum alloy welded joints[J]. Journal of Manufacturing Processes, 2020, 50: 380-393.
[8] 逯世杰, 郑乔, 张超华, 等. 不同有限元软件对Q390钢厚板T型接头焊接残余应力和变形预测精度与计算效率的比较[J]. 机械工程学报, 2019, 55(6): 11-12
Lu Shijie, Zheng Qiao, Zhang Chaohua, et al. A comparative study on computational accuracy and efficiency of welding residual stresses and deformation in a Q390 steel thick plate T joint among three kinds of different FEM software[J]. Journal of Mechanical Engineering, 2019, 55(6): 11-12
[9] Kong F, Ma J, Kovacevic R. Numerical and experimental study of thermally induced residual stress in the hybrid laser-GMA welding process[J]. Journal of Materials Processing Technology, 2011, 211(6): 1102-1111.
