scholarly journals FlexFlax Stool: Validation of Moldless Fabrication of Complex Spatial Forms of Natural Fiber-Reinforced Polymer (NFRP) Structures through an Integrative Approach of Tailored Fiber Placement and Coreless Filament Winding Techniques

2020 ◽  
Vol 10 (9) ◽  
pp. 3278 ◽  
Author(s):  
Vanessa Costalonga Martins ◽  
Sacha Cutajar ◽  
Christo van der Hoven ◽  
Piotr Baszyński ◽  
Hanaa Dahy
Keyword(s):  
High Performance ◽  
Natural Fiber ◽  
Filament Winding ◽  
Fiber Reinforced Polymers ◽  
Integrative Approach ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Fiber Placement ◽  
Flax Fibers ◽  
Performance Requirements

It has become clear over the last decade that the building industry must rapidly change to meet globally pressing requirements. The strong links between climate change and the environmental impact of architecture mean an urgent necessity for alternative design solutions. In order to propose them in this project, two emergent fabrication techniques were deployed with natural fiber-reinforced polymers (NFRPs), namely tailored fiber placement (TFP) and coreless filament winding (CFW). The approach is explored through the design and prototyping of a stool, as an analogue of the functional and structural performance requirements of an architectural system. TFP and CFW technologies are leveraged for their abilities of strategic material placement to create high-performance differentiated structure and geometry. Flax fibers, in this case, provide a renewable alternative for high-performance yarns, such as carbon, glass, or basalt. The novel contribution of this project is exploring the use of a TFP preform as an embedded fabrication frame for CFW. This eliminates the complex, expensive, and rigid molds that are traditionally associated with composites. Through a bottom-up iterative method, material and structure are explored in an integrative design process. This culminates in a lightweight FlexFlax Stool design (ca. 1 kg), which can carry approximately 80 times its weight, articulated in a new material-based design tectonic.

scholarly journals An Experimental Interpretation of High-Performance Fiber-Reinforced Polymer Concrete with FNN Paradigms

2020 ◽  
Vol 8 (5) ◽  
pp. 2624-2632
Keyword(s):  
High Performance ◽  
Fiber Reinforced Polymers ◽  
Polymer Concrete ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Rc Structures ◽  
Fuzzy Neural ◽  
High Performance Fiber ◽  
Design Defects ◽  
The Impact

Strengthening and enhancing of Reinforced Concrete (RC) structural components are important to broaden its administration period, overcoming the first structure limits and to limit the impact of construction defects as well as the design defects. In this work, Fiber Reinforced Polymers (FRPs) is utilized as to strengthen RC structures. In this paper, the utilization of FRP such as Sisal, Jute, and Coir in concrete structures is being examined for its viability in upgrading structural execution both regarding strength and ductility. The structural behavior of FRP specimen is examined by experimental and numerical examination by estimating the parameters, for example, compressive strength, tensile strength, ductility, and deflection. Here, we utilized the Fuzzy Neural Network (FNN) procedure to test the strength of specimen. At the point, when compared with existing work, the proposed FNN model achieves the greatest performance in terms of all parameters for the fiber reinforced specimen under various loaded condition.

Tensile Properties of Natural Fiber Reinforced Polymers: An Overview

2015 ◽  
Vol 766-767 ◽  
pp. 133-139 ◽  
Author(s):  
Jeswin Arputhabalan ◽  
K. Palanikumar
Keyword(s):  
Tensile Properties ◽  
Polymer Composites ◽  
Natural Fiber ◽  
Natural Fibers ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Reinforced Polymers ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites

This paper deals with tensile properties of natural fiber reinforced polymer composites. Natural fibers have recently found increasing use in various fields as an alternative to synthetic fiber reinforced polymers. Due to this they have become attractive to engineers, researchers and scientists. Natural fibers are replacing conventional fibers such as glass, aramid and carbon due to their eco-friendly nature, lesser cost, good mechanical properties, better specific strength, bio-degradability and non-abrasive characteristics. The adhesion between the fibers and the matrix highly influence the tensile properties of both thermoset and thermoplastic natural fiber reinforced polymer composites. In order to enhance the tensile properties by improving the strength of fiber and matrix bond many chemical modifications are normally employed. In most cases the tensile strengths of natural fiber reinforced polymer composites are found to increase with higher fiber content, up to a maximum level and then drop, whereas the Young’s modulus continuously increases with increasing fiber loading. It has been experimentally found that tensile strength and Young’s modulus of reinforced composites increased with increase in fiber content [1].

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

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2000 ◽  
Author(s):  
Gabriel Rihaczek ◽  
Maximilian Klammer ◽  
Okan Başnak ◽  
Jan Petrš ◽  
Benjamin Grisin ◽  
...  
Keyword(s):  
Composite Structures ◽  
Role Model ◽  
Building Materials ◽  
Natural Fiber ◽  
Weight Ratio ◽  
Design Tool ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Resource Saving ◽  
Fiber Placement

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.

scholarly journals Carbon Fiber Reinforced Polymers

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5545
Author(s):  
Francesca Lionetto
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
High Performance ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Polymers ◽  
Reinforced Polymers ◽  
Production Methods ◽  
Carbon Fiber Reinforced ◽  
Out Of Autoclave

The current demand for lightweight and high-performance structures leads to increasing applications of carbon fiber reinforced polymers, which is also made possible by novel production methods, automation with repeatable quality, the reduced cost of carbon fibers, out of autoclave processes such as resin transfer molding and resin infusion technologies, the re-use of waste fibers, development in preform technology, high-performance, fast-curing resins, etc [...]

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