Particle Method Simulation of Built Shapes in GMAW-based Additive Manufacturing

Abstract

Particle method, which represents fluid as groups of particles, is one of the fluid simulations. In this study, the process of additive manufacturing (AM) using gas metal arc welding was modeled by particle method in which Marangoni effect, the heat input and pressure of the arc are taken into consideration. Vertical wall building was analyzed to investigate the difference in the built shape because of cooling between passes. As a result, the vertical wall with cooling became taller and narrower and its width remained constant even after repeated building. This trend was also observed in the actual building results.