About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Presentation Title |
Working Curve Model to Enable Precise Curing of Functionally Graded Resin Systems |
| Author(s) |
Supreet Thale, Manas Vyas, TaeYoon Oh, Daniel A. Rau, Michael D. Bartlett, Christopher B. Williams |
| On-Site Speaker (Planned) |
Manas Vyas |
| Abstract Scope |
Functionally graded materials enable spatial control of material properties within a single structure, but existing photopolymer-based additive manufacturing (AM) methods remain limited in their ability to achieve continuous, selective grading in both the XY-plane and Z-direction. In this work, a hybrid AM process that combines material extrusion chemical reaction bonding (MEX-CRB) and vat photopolymerization (VPP) is presented for high-resolution multi-material functional grading. A dual-component extruder deposits prescribed resin compositions as a pre-layer, while a bottom-up UV light engine system selectively cures the material with controlled exposure. To predict curing behavior across arbitrary resin mixtures, a working curve model is introduced that relates graded composition to depth of penetration and critical exposure. The model is validated using off-the-shelf resins with distinct optical and polymerization characteristics to establish a predictive framework for multi-material photopolymer FGM fabrication. The process application is validated through absorber gradients, stiffness gradients, and an octopus-inspired functionally-graded gripper. |
| Proceedings Inclusion? |
Undecided |