Modelling of the two-beam laser deformation

Abstract

The article concerns the methods of numerical and computer modelling of the laser noncontact deformation by using two laser beams, brought to the one and opposite sides of the thin metal plate. The aim of this work is to determine the relation between the mutual arrangement of the lasers and the homogeneity of the deformation. To model this process the heat conduction equation is used. The location of the lasers is taken into account using boundary conditions. The computer modelling of the noncontact laser deformation using two lasers, brought to the one and opposite sides of the thin metal plate, showed that in case of the identical power value of the laser for different experiments, the mutual location of lasers with respect to each other and to the plate does not affect the value of the bend angle, but affects the homogeneity of deformation. In case of the lasers locations on different sides of the plate the most uniform bending occurs when at first the lower laser with lower density of power distribution is turned on, and then the laser with greater value of the parameter is turned on. In case of the lasers location on one side of the plate it does not matter whether the plate is heated by the laser with lower density of power distribution or not, before the laser with the greater value of the parameter is turned on. The results can be used by engineers and mechanics to prepare for the controlled noncontact laser deformation, as well as for choosing the optimal location of the lasers relative to the plate.