| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Modified Inherent Strain Modeling of Residual Stress and Distortion in WAAM and LPBF Processes |
| Author(s) |
Wen Dong, Albert C. To |
| On-Site Speaker (Planned) |
Wen Dong |
| Abstract Scope |
The laser powder bed fusion (L-PBF) and wire-arc additive manufacturing (WAAM) processes have been widely used to manufacture metal parts layer-by-layer in various sizes, geometries, and materials. However, due to the high-energy heat source, complex scanning path, and limited heat dissipation, the residual stress and distortion in the as-built part are inevitable and limit the application of these processes. The modified inherent strain (MIS) method has been developed for fast prediction of residual stress and distortion of metal AM parts. It includes three types of numerical simulations: (1) detailed process simulation to extract inherent strains at different pre-heat temperatures through thermomechanical analysis; (2) flash heating simulation to acquire the pre-heat temperature for each layer for a given part design; (3) MIS-based part-scale simulation to apply inherent strains accordingly to each layer of the part. The proposed method is experimentally validated and shows good accuracy for a few printed parts. |