About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Process-Aware Topology Optimization for Mitigating Residual Stress and Distortion in Laser Powder Bed Fusion |
Author(s) |
Praveen Vulimiri, Albert To |
On-Site Speaker (Planned) |
Albert To |
Abstract Scope |
Laser powder bed fusion (LPBF) is a popular method to produce complex metal additive manufactured (AM) parts. However, during the process, the laser melting of the metal powder introduces thermal stresses which distort the part from the desired dimensions. If the stress is large, it could lead to cracking, recoater blade crash, or other build failures. A data-driven model based on the convolutional neural networks training on the modified inherent strain simulation data has been developed to provide a near instantaneous approximation of the residual stress and deformation in a part. The model is employed in topology optimization to optimize the part for end use application and minimum distortion during the build process simultaneously. The optimized designs obtained using the proposed process-aware topology optimization are compared with freeform and overhang angle constrained topology optimization methods. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |