About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Modified Inherent Strain Method |
Author(s) |
Albert To |
On-Site Speaker (Planned) |
Albert To |
Abstract Scope |
The modified inherent strain (MIS) method is developed for the fast prediction of residual distortion and stress for metal parts produced by beam-based additive manufacturing (AM) processes. A model is proposed to extract the inherent strains from scanwise process simulation, and the extracted inherent strains are applied to a layerwise quasi-static finite element analysis model to simulate residual stress and deformation accurately and efficiently. The MIS model is shown to be much more accurate than the original IS model that is based on plastic strain alone. Recent advancements of the MIS method include a two-temperature numerical implementation and an accurate layer lumping technique that makes the method even more accurate and faster. Some applications of the MIS method will be presented including optimization of support structure, build orientation, and scanning pattern. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |