| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Beyond the Beam II
|
| Presentation Title |
Distortion Modeling of Sintering Process in Binder Jet Printed Parts |
| Author(s) |
Basil J. Paudel, Dave Conover, Albert To |
| On-Site Speaker (Planned) |
Basil J. Paudel |
| Abstract Scope |
During sintering of binder jet printed parts, distortion, often anisotropic, is seen with shrinkage values in the range of ~5-20%. The geometry and complexity of the part combined with the sintering stress and high temperature creep makes prediction of the final part geometry more difficult, thus hindering its wide adoption in the industry. In the present study, a viscoelasticity based constitutive model is adopted to predict the distortion during sintering of the stainless steel 316L BJP parts. The effects of friction and gravity are considered. The model is coded as a usermat subroutine and applied in ANSYS Mechanical APDL to simulate distortion in a part. An evolutionary algorithm (EA) is utilized to identify material specific constitutive parameters. The shrinkage results from the numerical analysis using identified parameters were validated against the experiment. It is shown that the proposed model agrees reasonably with the distortion data obtained during the sintering process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Other |