Title: A STUDY OF LAYER-WISE ADAPTIVE RESIN FLOW FOR IMPROVED SURFACE FINISH OF 3D PRINTED CONTINUOUS FIBER REINFORCED COMPOSITE

Authors: Md Atikur Rahman, Md Zahirul Islam, Luke Gibbon, Eric Hall, Chad A. Ulven, John J. La Scala

DOI: 10.33599/nasampe/s.23.0171

Abstract: Additive Manufacturing (AM) / 3D printing technologies are rapidly evolving to provide solutions for future manufacturing challenges. Mechanical properties of 3D printed polymer composites can be maximized by utilizing continuous fiber reinforcement accompanied by a thermoset matrix. Due to the flow and shrinkage properties of light curable thermoset resins, AM of continuous fiber reinforced thermoset composites exhibit the formation of voids inside the composite. These voids significantly limit the mechanical performance of 3D printed continuous fiber composites. This study addresses experimental methods of reducing void content in 3D printed composites via reduction of surface roughness. Specifically, layer thickness, line spacing, resin flowrate, and resin rheology all can affect the void content in 3D printed composites. Layer-wise optimization of the print parameters was conducted by microscopic surface topographic analysis. Using the results from surface topography of the previous printed layer, resin volume was adjusted to counteract the growth of surface roughness in successively printed layers. This study showed surface roughness of 3D printed continuous fiber reinforced thermoset could be reduced with the analysis of surface topography and variable resin flowrate.

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Conference: SAMPE 2023

Publication Date: 2023/04/17

SKU: TP23-0000000171

Pages: 12

Price: $24.00