Abstract Scope |
Predicting residual stresses in WAAM built parts is a growing area of research due to its increased application in advanced manufacturing techniques. Using the finite element (FE) method, a sequentially couple thermomechanical model has been created to predict the presence of residual stresses in thin wall and rastered parts made with maraging (M250) steel. During thermal model calibration efforts, experimental temperature data has shown unique data spikes which are caused by an unknown phenomenon. Our research is focused on understanding these phenomena and the role parameters such as heat source inputs, boundary conditions, material properties, print speed, print path, and idle time play in improving thermal model accuracy and ultimately predicting residual stresses in WAAM built parts. With this in mind, a design of experiments has been conducted to provide a framework for effective thermal modeling calibration of the WAAM process in the hopes of improving residual stress prediction. |