| About this Abstract |
| Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
| Symposium
|
Physical Modeling
|
| Presentation Title |
Numerical Prediction of Thermal Histories and Residual Stresses for Directed Energy Deposition (DED) Powder-blown Process |
| Author(s) |
Jakub Mikula, Athanasius L. Commillus, Guglielmo Vastola, Zhang Yong Wei |
| On-Site Speaker (Planned) |
Jakub Mikula |
| Abstract Scope |
In this work, we have developed a thermal and mechanical solver as part of a in-house C++ code in order to predict thermal histories and residual stresses in 3D components printed by Directed Energy deposition (DED) powder-blown technology. In contrast to the conventional powder-bed process where the part is built in a layer-by-layer fashion, here the component is progressively built up by a continuous deposition (of molten material) controlled by the g-code (machine’s code for the tool path). Efficient predictions of thermal histories on the component scale are of utmost importance providing guidance to g-code optimization to tailor the mechanical properties and the residual stress. Starting with CAD data, we discuss the numerical implementation of the heat source following the g-code path and demonstrate the results on a printed aerofoil component. This work is a prerequisite for other meso-scale simulations aiming to model the manufacturing process with sufficient fidelity. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |