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• W4283260403 endingPage "38" @default.
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• W4283260403 abstract "Deep penetration laser beam welding is simulated using the mesh-free Lagrangian Smoothed Particle Hydrodynamics (SPH) method. The physical phenomena modeled are the elastic material behavior of the solid phase, the fluid dynamics of the liquid phase including temperature-dependent surface tension, heat transfer by heat conduction, and the phase transitions melting, solidification, and evaporation. The energy input of the laser beam is determined by a ray-tracing scheme that calculates the absorbed irradiance distribution in the capillary. Based on the locally absorbed irradiance, an improved recoil pressure model is introduced and compared with a temperature-dependent model frequently used in the literature. To transfer the momentum of the recoil pressure to the surrounding melt, two boundary conditions based on either dynamically detected boundary particles or surface forces are presented and validated using simple examples. The results show that the recoil pressure is a key factor for the formation of a deep capillary and the acceleration of the melt around the capillary. Comparison of capillary geometry and melt pool size from simulation and experiment shows good agreement for the irradiance-dependent recoil pressure model. • Simulation of deep penetration laser beam welding by coupling the SPH method with a ray-tracing scheme. • Improved recoil pressure model for the evaporation of liquid melt during laser beam welding. • Evaluation of boundary conditions to transfer the momentum of the recoil pressure. • Influence of the recoil pressure on the capillary geometry and the melt dynamics. • Comparison of the melt pool size and the capillary geometry between simulation and experiment" @default.
• W4283260403 created "2022-06-23" @default.
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• W4283260403 date "2022-11-01" @default.
• W4283260403 modified "2023-09-27" @default.
• W4283260403 title "An improved recoil pressure boundary condition for the simulation of deep penetration laser beam welding using the SPH method" @default.
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• W4283260403 doi "https://doi.org/10.1016/j.euromechflu.2022.06.001" @default.
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