Title: INTRODUCTION OF AN ADDITIVE MANUFACTURING PROCESS FOR MULTI-MATRIX FIBER REINFORCED COMPOSITES

Authors: Simon Konze, Axel Spickenheuer, Sascha Bruk, Lars Bittrich, Tales V. Lisbôa, Markus Stommel, Martin Wildemann, Johannes Herold

DOI: 10.33599/nasampe/s.23.0050

Abstract: The integration of flexible zones into otherwise stiff fiber-reinforced plastics offers great potential for functional integration regarding bending and damping possibilities. An additive process has been developed to produce multi-matrix fiber-reinforced composites (MMC). By means of an elastomer print head, predefined zones in fiber preforms are impregnated with a first matrix system in an automated operation. After curing these zones while under vacuum, all fiber areas that are still dry can be infiltrated with a second matrix system, by a subsequent vacuum infusion. This method generates a composite structure with various and clearly defined matrix zones of almost any size and shape. Using matrix materials with different stiffness properties, such as epoxy resin and polyurethane, both very stiff and flexible regions can be integrated into a composite structure. A process-chain was established and applied for this novel technology. Key results have shown good impregnation quality of both matrices forming a distinct transition zone. Furthermore, deformation occurs only in the elastomeric region for produced bending specimens.

References: 1. Michaud, V. “A Review of Non-saturated Resin Flow in Liquid Composite Moulding processes.” Transp. Porous Media 2016, 115: 581–601. https://doi.org/10.1007/s11242-016-0629-7. 2. Lionetto, F., Moscatello, A., Totaro, G., Raffone, M., Maffezzoli, A. “Experimental and Numerical Study of Vacuum Resin Infusion of Stiffened Carbon Fiber Reinforced Panels.” Materials 2020, 13, 4800. https://doi.org/10.3390/ma13214800 3. Krollmann, Jan. “A contribution to integral fiber reinforced hinges based on carbon fiber reinforced elastomers and the hybrid-matrix approach.” Disseration, München: TU München, 2018. 4. K. Gliesche, K. & Feltin, D. “Beanspruchungsgerechte Textilkonstruktionen für Composite-bauteile.“ Technische Textilien/Technical Textiles (38) (1995): 209. 5. Mattheij, P., Gliesche, K. & Feltin, D. “Tailored fiber placement - mechanical properties and applications.” Journal of Reinforced Plastics and Composites 17(9) (1998): 774–786. 6. Feltin, Dirk. “Industrial use of Tailored Fibre Placement.” Presentation at Tailored Fibre Placement Meets Industrial Partners, Dresden, Germany, November 13, 2012. 7. Bittrich, L., Spickenheuer, A., Almeida Jr., J.H.S., Müller, S., Kroll, L. & Heinrich, G. “Optimizing variable-axial fiber-reinforced composite laminates: The direct fiber path optimization concept.” Mathematical Problems in Engineering (2019): ID 8260563.

Conference: SAMPE 2023

Publication Date: 2023/04/17

SKU: TP23-0000000050

Pages: 10

Price: $20.00