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)
|
Presentation Title |
Optimal Truss-Type Supports for Minimal Part Deformation in LPBF |
Author(s) |
Subodh Chandra Subedi, Dan J Thoma, Krishnan Suresh |
On-Site Speaker (Planned) |
Subodh Chandra Subedi |
Abstract Scope |
Adequate thermal dissipation through support structures is crucial for part printability in laser powder bed fusion (LPBF). Truss-type supports have been proposed for better thermal management in LPBF. Further truss structures are easy to analyze, optimize and post-process. In this paper, we consider coupled thermo-elastic LBPF simulation, where a part and corresponding truss-type support are progressively coupled during the build process. Transient thermal FEA is performed as each layer is built to obtain temperature profiles. Thermal equivalent static loads (ESL) are obtained from the transient results, which are accumulated to compute aggregate equivalent static load (AESL). Elastic deformation of coupled systems involving part and truss-type supports, is also computed after each layer-wise built. Finally, cross-sectional areas of truss-type supports are optimized using AESL to minimize elastic deformation. Optimized supports show significant reduction in part deformation compared to un-optimized supports. Numerical results are presented to demonstrate the merits of proposed method. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |