• Chinese Journal of Lasers
  • Vol. 48, Issue 18, 1802008 (2021)
Kangmei Li, Xingzhe He, Yu Cai, and Jun Hu*
Author Affiliations
  • College of Mechanical Engineering, Donghua University, Shanghai 201620, China
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    DOI: 10.3788/CJL202148.1802008 Cite this Article Set citation alerts
    Kangmei Li, Xingzhe He, Yu Cai, Jun Hu. Stress Field Simulation of Friction Stir Welding and Laser Peening Composite Process[J]. Chinese Journal of Lasers, 2021, 48(18): 1802008 Copy Citation Text show less
    Finite element simulation flowchart of friction stir welding (FSW) and laser peening (LP) composite process
    Fig. 1. Finite element simulation flowchart of friction stir welding (FSW) and laser peening (LP) composite process
    Finite element model. (a) Overall model; (b) meshing strategy
    Fig. 2. Finite element model. (a) Overall model; (b) meshing strategy
    Schematics of model boundary conditions. (a) Heat transfer analysis; (b) stress evolution analysis
    Fig. 3. Schematics of model boundary conditions. (a) Heat transfer analysis; (b) stress evolution analysis
    Diagram of pressure change over time[21]
    Fig. 4. Diagram of pressure change over time[21]
    Laser peening strategy
    Fig. 5. Laser peening strategy
    Simulated stress distribution. (a) Whole stress distribution; (b) cross-sectional metallographic diagram[25]; (c) cross-sectional stress distribution
    Fig. 6. Simulated stress distribution. (a) Whole stress distribution; (b) cross-sectional metallographic diagram[25]; (c) cross-sectional stress distribution
    Comparison of experimental and simulated residual stress in the Y-axis direction after treating by friction stir welding. (a) Z=0 mm; (b) Z=6.4 mm
    Fig. 7. Comparison of experimental and simulated residual stress in the Y-axis direction after treating by friction stir welding. (a) Z=0 mm; (b) Z=6.4 mm
    Schematic of advancing side (AS) and retreating side (RS) of the friction stir welded plate
    Fig. 8. Schematic of advancing side (AS) and retreating side (RS) of the friction stir welded plate
    Comparison of experimental and simulated residual stress in the Y-axis direction after treating by composite processing
    Fig. 9. Comparison of experimental and simulated residual stress in the Y-axis direction after treating by composite processing
    Residual stress distributions of welded sheet treated by different processes. (a) Friction stir welding; (b) laser peening; (c) friction stir welding+laser peening
    Fig. 10. Residual stress distributions of welded sheet treated by different processes. (a) Friction stir welding; (b) laser peening; (c) friction stir welding+laser peening
    Comparison of simulated residual stress of welded sheet treated by different processes. (a) Data extraction paths; (b) residual stress along X direction; (c) residual stress along Y direction; (d) residual stress along Z direction
    Fig. 11. Comparison of simulated residual stress of welded sheet treated by different processes. (a) Data extraction paths; (b) residual stress along X direction; (c) residual stress along Y direction; (d) residual stress along Z direction
    Comparison of simulated residual stress under different initial tensile stress states. (a) Data extraction path; (b) comparison chart of residual stress; (c) change trend of residual stress reduction value
    Fig. 12. Comparison of simulated residual stress under different initial tensile stress states. (a) Data extraction path; (b) comparison chart of residual stress; (c) change trend of residual stress reduction value
    Attenuation trend graph of stress wave. (a) Laser peening; (b) friction stir welding+laser peening
    Fig. 13. Attenuation trend graph of stress wave. (a) Laser peening; (b) friction stir welding+laser peening
    Comparison chart of absolute peak stress
    Fig. 14. Comparison chart of absolute peak stress
    Stirring head shoulder radius /mmStirring needle radius /mmStirring needle height /mmFeed rate /(mm·s-1)Rotational speed /(r·min-1)
    207.512.52.5300
    Table 1. Simulation parameters for friction stir welding
    A /MPaB /MPaCn
    5003620.0130.922
    Table 2. Johnson-Cook model parameters of 2195 aluminum lithium alloy
    Kangmei Li, Xingzhe He, Yu Cai, Jun Hu. Stress Field Simulation of Friction Stir Welding and Laser Peening Composite Process[J]. Chinese Journal of Lasers, 2021, 48(18): 1802008
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