Abstract
A welding process simulation considering the weld pool and dropped metal during welding which have a fluid flow with thermal conduction and a free surface is performed by using the hybrid particle and grid method with Explicit MPS. In this study, first, the applicability of Explicit MPS to the welding process is studied. Second, a hybrid particle and grid method is developed. In the hybrid method, particles can be used in the weld pool and the area located near the weld pool, while grid elements are used in the other areas. For high-speed simulation of the weld pool, all of calculation processes are parallelized and accelerated by a GPU (CUDA). The welding process simulation using the hybrid method can reduce the calculation cost reasonably within 1 to 2 % accuracy or so on.
