About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Presentation Title |
Thermal Monitoring and Cure Process Modelling of Dual-wavelength VPP Printing |
Author(s) |
Heyang Zhang, Yue Zhang, Xiayun Zhao |
On-Site Speaker (Planned) |
Heyang Zhang |
Abstract Scope |
Dual-wavelength vat photopolymerization (VPP) is an emerging multi-material additive manufacturing (AM) technology in which liquid photopolymers are selectively cured by two individually controlled light beams that have disparate wavelengths. In this work, ultraviolet and visible light beams are delivered through digital light processing (DLP) using digital micromirror devices. A model multi-material system that comprises epoxy and acrylate curing components is used. As the heat generated differs between epoxy and acrylic curing reactions, a thermal model with binary heat sources is created using in-situ thermal monitoring, ex-situ photo differential scanning calorimetry, and inverse heat conduction (IHCP) optimization methods to estimate the exothermic rate, time-resolved thermal profile, and degree of curing during the dual-wavelength VPP. This work will develop a framework of integrating in-situ thermal monitoring, physics simulation, and data-driven modeling to identify and quantify different reactions occurring during multi-wavelength multi-material VPP processes. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |