Numerical Estimation of the Influence of Yb:YAG Laser Beam Caustic on the Formation of Welding Pool in Laser-Arc Hybrid Welding Process |
| M. Kubiak
Częstochowa University of Technology, al. Armii Krajowej 19, 42-201 Częstochowa, Poland |
| Full Text PDF |
| The major aim of this work is the numerical analysis of the influence of Yb:YAG laser beam power distribution in the function of laser beam caustics on the formation of welding pool in butt welded sheets made of S355 steel. The laser beam heat source is modelled on the basis of geostatistical kriging interpolation method using measurements of Yb:YAG laser intensity for different beam focusing. Thermal phenomena with fluid flow in the melted zone are described by equations of mass, momentum, and energy conservation. Differential governing equations are solved using Chorin's projection with finite volume method on staggered grid. Obtained results include temperature field and melted material velocity field. Numerically predicted welding pool geometry in the cross-section of the joint is partially verified by experimental results. |
DOI:10.12693/APhysPolA.138.218 topics: hybrid welding, Yb:YAG, thermal phenomena, numerical modelling |