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Article

Curved Foldable Tailored Fiber Reinforcements for Moldless Customized Bio-Composite Structures. Proof of Concept: Biomimetic NFRP Stools

1
ITECH Masters Program, University of Stuttgart, Keplerstr. 11, 70174 Stuttgart, Germany
2
Department of Bio-based Materials and Materials Cycles in Architecture (BioMat) at Institute of Building Structures and Structural Design (ITKE), University of Stuttgart, Keplerstrasse 11, 70174 Stuttgart, Germany
3
Institute of Aircraft Design (IFB), University of Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany
4
Faculty of Engineering, Department of Architecture (FEDA), Ain Shams University, Cairo 11517, Egypt
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(9), 2000; https://doi.org/10.3390/polym12092000
Received: 31 July 2020 / Revised: 31 August 2020 / Accepted: 31 August 2020 / Published: 2 September 2020
(This article belongs to the Special Issue Functional Polymer Composites)
Fiber Reinforced Polymers (FRPs) are increasingly popular building materials, mainly because of their high strength to weight ratio. Despite these beneficial properties, these composites are often fabricated in standardized mass production. This research aims to eliminate costly molds in order to simplify the fabrication and allow for a higher degree of customization. Complex three-dimensional shapes were instead achieved by a flat reinforcement, which was resin infused and curved folded into a spatial object before hardening. Structural stability was gained through geometries with closed cross-sections. To enable this, the resource-saving additive fabrication technique of tailored fiber placement (TFP) was chosen. This method allowed for precise fibers’ deposition, making a programmed anisotropic behavior of the material possible. Principles regarding the fiber placement were transferred from a biological role-model. Five functional stools were produced as demonstrators to prove the functionality and advantages of the explained system. Partially bio-based materials were applied to fabricate the stool models of natural fiber-reinforced polymer composites (NFRP). A parametric design tool for the global design and fiber layout generation was developed. As a result, varieties of customized components can be produced without increasing the design and manufacturing effort. View Full-Text
Keywords: stiffness gradient; curved folding; digital fabrication; tailored fiber placement; bio-composites; moldless; natural fiber-reinforced polymers; NFRP stiffness gradient; curved folding; digital fabrication; tailored fiber placement; bio-composites; moldless; natural fiber-reinforced polymers; NFRP
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MDPI and ACS Style

Rihaczek, G.; Klammer, M.; Başnak, O.; Petrš, J.; Grisin, B.; Dahy, H.; Carosella, S.; Middendorf, P. Curved Foldable Tailored Fiber Reinforcements for Moldless Customized Bio-Composite Structures. Proof of Concept: Biomimetic NFRP Stools. Polymers 2020, 12, 2000. https://doi.org/10.3390/polym12092000

AMA Style

Rihaczek G, Klammer M, Başnak O, Petrš J, Grisin B, Dahy H, Carosella S, Middendorf P. Curved Foldable Tailored Fiber Reinforcements for Moldless Customized Bio-Composite Structures. Proof of Concept: Biomimetic NFRP Stools. Polymers. 2020; 12(9):2000. https://doi.org/10.3390/polym12092000

Chicago/Turabian Style

Rihaczek, Gabriel, Maximilian Klammer, Okan Başnak, Jan Petrš, Benjamin Grisin, Hanaa Dahy, Stefan Carosella, and Peter Middendorf. 2020. "Curved Foldable Tailored Fiber Reinforcements for Moldless Customized Bio-Composite Structures. Proof of Concept: Biomimetic NFRP Stools" Polymers 12, no. 9: 2000. https://doi.org/10.3390/polym12092000

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