About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Simulation of Curing Behavior with Temperature Dependent Kinetic Constants in Vat Photopolymerization |
Author(s) |
Yue Zhang, Heyang Zhang, Xiayun Zhao |
On-Site Speaker (Planned) |
Yue Zhang |
Abstract Scope |
Vat photopolymerization (VPP) prints 3D parts by crosslinking monomers with light activation. The degree of conversion (DoC) is a primary indicator of VPP performance since it is closely related to the resulting geometrical and mechanical properties. A common approach to obtain DoC is via simulation, which however has limited accuracy due to using simplified models that assume invariant reaction rate constants during VPP. In this work, we develop a method of modeling and simulating a digital light processing (DLP) based VPP process, which incorporates the potential effect of process temperature on kinetic constants, by coupling the chemical kinetics with heat and mass transfer. In-situ thermal monitoring is used to update the model and simulation parameters. Experiment is conducted to validate the developed model simulation approach by comparing the predicted DoC with a Fourier-transform infrared spectroscopy (FTIR) characterization result. The method can be used for DLP-VPP process planning, optimization and control. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |