About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Predicting Recoater Interference in Laser Powder Bed Fusion Process by Considering Both Global Thermal Deformation and Local Edge Deformation |
Author(s) |
Wen Dong, Shawn Hinnebusch, Albert To |
On-Site Speaker (Planned) |
Albert To |
Abstract Scope |
This work proposes an integrated simulation and experimental framework to predict potential recoater interference for a given part designed for L-PBF fabrication. The largest deformation in the build direction is assumed to occur at the edge of a part and is postulated to be the sum of two contributions: global thermal deformation and local edge deformation. The global thermal deformation, generated by relaxation of the thermal stresses induced by the rapid laser melting and solidification over the entire part, is predicted using the modified inherent strain (MIS) method. A key novelty in this work lies in employing location-dependent inherent strains (ISs) in the MIS method to simulate the global thermal deformation of overhangs, which shows 60% improvement in prediction accuracy compared with that using constant ISs. The validity of the proposed framework for predicting recoater interference is confirmed by experiments on different part geometries with overhangs. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |