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 |
Thermal Modeling, Bead Parameterization, and Toolpath Analysis of Material Extrusion Additive Manufacturing |
Author(s) |
Amy M. Peterson, Tone D'Amico, Masoumeh Pourali |
On-Site Speaker (Planned) |
Amy M. Peterson |
Abstract Scope |
We have developed a finite element model to simulate heat transfer and generate temperature profiles during material extrusion AM (MatEx) of amorphous polymers. At benchtop (fused filament fabrication, FFF) scales, short times over Tg were reported, indicating limited opportunity for interlayer diffusion. At larger (big area additive manufacturing, BAAM) scales, much longer times above Tg were observed, which can lead to continued flow of extruded material and warping of the printed structure. The effects of material and processing parameters were investigated at both scales, and different trends were observed at the small and large scales. We have also investigated the importance of geometry and toolpath design. Finally, we have begun efforts to predict properties of FFF-printed semi-crystalline polymers. Combined, these results indicate that designing MatEx materials and processes in concert will lead to improved structure performance, and give preliminary guidance in development of design rules. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |