| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Minimizing Large Distortions in Binder Jetted Parts via Accurate Modeling and Compensation |
| Author(s) |
Basil J. Paudel, Albert C To |
| On-Site Speaker (Planned) |
Basil J. Paudel |
| Abstract Scope |
Binder jet parts undergo more than 15% shrinkage during sintering, a process that facilitates densification. This distortion, if not corrected, results in parts with unacceptable geometric accuracy. The current work investigates the scaling/spatial effects and proposes an approach to compensate input geometry based on mechanistic simulations and a data-driven method. A gaussian process approach is proposed to learn the deformation pattern in binder jetted parts and offset for the sintering deformation. A physics-based constitutive model is utilized to generate a training database, which is dimensionally reduced to extract the principal features. The trained model is utilized to predict the compensated part. Experimental results indicate that powder spreading process affects the green density of the fabricated parts by as much as 6-8% variation in density within the same build. The effectiveness of various corrective actions is validated both numerically and experimentally by comparing the deformed sintered shape against the target. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |