Three-dimensional analysis of the high-power laser cutting process by using a finite-element method
The formation of a deep groove by evaporation on a solid is considered. Evaporation removal of material is achieved by focusing a high-power, highly concentrated Gaussian laser beam of constant wattage (CW laser) onto the surface of the solid. A numerical solution for the groove shape of the solid with an exponentially decaying source and proper boundary conditions is obtained using a three-dimensional finite-element method. The appropriate dimensionless parameters (N[sub k],B[sub i],N[sub e] and U ) are identified. The results for the groove depth and shape are presented for a variety of laser and solid parameters and compared with the results of the two-dimensional slab.