| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Universal Differential Equations for Transient Thermal Modeling of Directed Energy Deposition Additive Manufacturing |
| Author(s) |
Praveen S. Vulimiri, Albert C. To |
| On-Site Speaker (Planned) |
Praveen S. Vulimiri |
| Abstract Scope |
Analytical thermal modeling approaches, such as the Green’s function, were some of the first methods to accurately predict the thermal field of a welding or additive manufacturing process. Compared with numerical approaches like finite element modeling, analytical models provide a very fast approximation but simplify the problem by using constant material properties and ignoring nonlinear boundary conditions (i.e. radiation). Using a technique known as universal differential equations, this work approximates the Green’s function with temperature-dependent material properties, complex geometry, and nonlinear boundary conditions using neural networks and integrates the function using ordinary differential equation solvers. The results show better agreement with finite element analysis data for Ti64 directed energy deposition simulations with computational time comparable with the analytical Green’s function. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |