About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Physical Modeling
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Presentation Title |
Modeling Light Scattering Vat Photopolymerization Resins with Monte Carlo Ray Tracing |
Author(s) |
Keyton Feller, Viswanath Meenakshisundaram, Timothy Long, Robert Mahan, Christopher Williams |
On-Site Speaker (Planned) |
Keyton Feller |
Abstract Scope |
Vat photopolymerization (VP) of suspension resins exhibit lower resolution compared to their homogenous counterparts due to the filler particles redistributing light intensity through scattering. In order to predict curing and improve printed resolution of these resins, the authors have demonstrated a Monte Carlo ray-tracing simulation to model the scattering behavior. Using inputs of material optical constants, projected intensity distribution, and medium working curve constants resultant cure profiles can be predicted. Simulated cure profiles were validated by VP printing of a custom photocurable styrene-butadiene latex (SBR) resin with a mean particle radius of 70 nm. Cure profiles of SBR loadings from 5 vol% to 30 vol% were simulated and produced cure depths within 50 µm of experimental values. Utilization of this simulation enables reasonably accurate estimations to aid in resin formulation and provides the basis for future work in bitmap correction to increase print resolutions. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |