About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
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Physical Modeling
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Presentation Title |
Part-scale Thermal FEA Modeling and Experimental Validation of Laser Powder Bed Fusion |
Author(s) |
Chao Li, Erik Denlinger, Michael Gouge, Jeff Irwin, Pan Michaleris, Abdalla Nassar, Qian Wang, Zhuoer Chen, Chris Davies |
On-Site Speaker (Planned) |
Chao Li |
Abstract Scope |
Thermal modeling of laser powder bed fusion (PBF) could calculate the thermal history of a build, which can in turn be used as an input to predict temperature related characteristics such as residual stress, distortion, microstructure, lack of fusion, and hot spots. To estimate the heat loss to the powder bed during the process, convective heat transfer is widely used as thermal boundary condition. However, this convection coefficient is usually selected based on empirical estimation. Autodesk Netfabb Simulation offers three thermal BCs options: universal convective, trapped powder, and material dependent convective. In this work, thermocouple measurements of the substrate and parts during the build are used to validate our thermal FEA models. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |