| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Coupling Damage Models to Multiscale Modeling of the Selective Laser Melting Process for Metals |
| Author(s) |
Patcharapit Promoppatum, Sabeur Msolli, Jerry Quek Siu Sin, Mark Hyunpong Jhon |
| On-Site Speaker (Planned) |
Patcharapit Promoppatum |
| Abstract Scope |
Although multiscale modeling has been successfully used to aid design of parts, relatively little effort has been made to predict damage occurring during the build process. Herein, we propose that by coupling a micromechanics-based damage model to the inherent strain approach for residual stress, it is possible to predict the evolution of damage in the part during the build process. The numerical prediction was performed with a bottom-up approach, where the amount of porosity was firstly estimated. Subsequently, failure behaviors dictated by internal defects were determined from a micromechanical-based calculation. Coupling a damage behavior to a part scale calculation by imposing a cohesive layer at part-substrate interface, the failure at the interface can be assessed from the development of plastic strain and stress triaxiality during the build at part level. Ultimately, our model develops understanding of the relationships between scan strategy, porosity from unmelted powder, and the ductile fracture process. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |