Thermal Elastic Plastic Analysis and Validation on Metal Additive Manufacturing Problem Using Domain Decomposition Method and Simplified Heat Source Model

Abstract

The metal additive manufacturing problems can be modeled by the one way coupling problem from a heat conduction to a thermal elastic plastic analysis. It costs a lot of time and temperature steps to analyze the problems. To reduce the numbers of these steps, our previous studies used the balancing domain decomposition method as a parallel strategy, and a simplified heat source model. The model allows to sequentially heat an entire layer one by one, and this process continues until all layers are simulated. However, it was only applied to a simulation of depositing a plate. Thus, this study focuses on applying the model to a shape other than a plate with the balancing domain decomposition method. Especially, a half pipe model was considered. The paper presents how to find parameters of the simplified heat source model on the half pipe model. One of numerical results showed a speedup of more than one hundred times. They were also verified and validated.