Plastique renforcé de fibres

thumb|Cuves en plastique à renfort fibre de verre. thumb|Tissu fibre de verre/aramide (pour haute traction et compression). Un plastique renforcé de fibres ou polymère renforcé de fibres (en anglais, fibre-reinforced plastic ou FRP) est un matériau composite constitué d’une matrice polymère (appelée résine) renforcée par de fines fibres (souvent synthétiques) à haut module. La résine est généralement un polyester thermodurcissable, un époxyde, un vinylester, ou thermoplastique (polyamide...) ; les fibres de verre, de carbone ou d’aramide sont les plus courantes. Le matériau est en général anisotrope. Ses propriétés de résistance (mécanique, chimique) et sa densité sont très favorables, comparé aux métaux. Apparus récemment, ces matériaux trouvent un usage dans de nombreux secteurs : automobile, marine, matériaux de construction, aéronautique, aérospatiale, équipements résistants à la corrosion (tels réservoirs, récipients, tuyaux) Articles connexes

Fibre technique
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Optimization of MEW instrument components and their assembly

Jianan Mao

In recent years, a new additive manufacturing technology Melt Electrowriting (MEW) has become attractive, especially for biomedical applications, and it has potential in many other fields as well. In order to carry out an in-depth study of melt electrowriting in the future, this project aims at two parts: designing and assembling a melt electrowriting instrument; and testing the printing performance of melt electrowriting. The final version of MEW instrument meets all the requirements and is capable of printing straight fibres under control. The printhead fixture provides a range of movement of 110.4 mm in the Z-direction of the nozzle. The nozzle is located in the middle of the collector and can be moved horizontally by moving the platform. The printhead fixture does not interfere with the movement of the XY stage. The dimensions of the enclosure are 800 mm x 650 mm x 650 mm, providing additional space for internal operations. There are 5 windows in the enclosure to create a stable environment inside the enclosure and maintain user visibility. The material of the enclosure and printhead fixture is nonconductive anodised aluminium. The total cost is 1982.4 CHF. After assembling the instrument, three tests were carried out to test the printing process: a critical translation speed (CTS) test, an inter-fibre distance test, and an overhang and fibre stacking test. CTS test result : the conversion of sinusoidal fiber to linear fiber indicates that the CTS is 6.6 mm/s In the results, the CTS is 6.6 mm/sec and the minimum inter-fibre distance is 50 μm. Overhanging structures and fibre stacks can be printed, but they need to be precisely controlled. Establishing an integrated control system and investigating optimised parameters are future tasks.

2021

Chargement

Recycled Glass Fiber Composites from Wind Turbine Waste for 3D Printing Feedstock: Effects of Fiber Content and Interface on Mechanical Performance

Kazem Fayazbakhsh, Rodolphe Henri

This research validates the viability of a recycling and reusing process for end-of-life glass fiber reinforced wind turbine blades. Short glass fibers from scrap turbine blades are reclaimed and mixed with polylactic acid (PLA) through a double extrusion process to produce composite feedstock with recycled glass fibers for fused filament fabrication (FFF) 3D printing. Reinforced filaments with different fiber contents, as high as 25% by weight, are extruded and used to 3D print tensile specimens per ASTM D638-14. For 25 wt% reinforcement, the samples showed up to 74% increase in specific stiffness compared to pure PLA samples, while there was a reduction of 42% and 65% in specific tensile strength and failure strain, respectively. To capture the level of impregnation of the non-pyrolyzed recycled fibers and PLA, samples made from reinforced filaments with virgin and recycled fibers are fabricated and assessed in terms of mechanical properties and interface. For the composite specimens out of reinforced PLA with recycled glass fibers, it was found that the specific modulus and tensile strength are respectively 18% and 19% higher than those of samples reinforced with virgin glass fibers. The cause for this observation is mainly attributed to the fact that the surface of recycled fibers is partially covered with epoxy particles, a phenomenon that allows for favorable interactions between the molecules of PLA and epoxy, thus improving the interface bonding between the fibers and PLA.

2019

Chargement

Design of a light-shaping adaptive facade using fiber-reinforced polymer materials

Joëlle Baehr-Bruyère

2019

Chargement

Plastique à renfort de verre

Un plastique à renfort de verre (ou Polyester Renforcé de fibres de Verre ou Polymère Renforcé aux fibres de Verre, symbolisé habituellement par ses initiales PRV ; en anglais, glass-reinforced plas

Matériau composite

vignette|Multicouche, un exemple de matériau composite. Un matériau composite est un assemblage ou un mélange hétérogène d'au moins deux composants, non miscibles mais ayant une forte capacité d'inter

Fibre de verre

La fibre de verre est un filament de verre. Par extension, les plastiques à renfort de verre sont aussi appelés fibre de verre. Les fibres de verre, constituent avec les verres creux, les verres pl

MSE-440: Composites technology

The latest developments in processing and the novel generations of organic composites are discussed. Nanocomposites, adaptive composites and biocomposites are presented. Product development, cost analysis and study of new markets are practiced in team work.

MSE-340: Polymer composites + Laboratory Work

Les propriétés mécaniques et physiques des composites anisotropes ainsi que leurs outils de calcul sont présentés. Les constituants, les mises en oeuvre et les relations microstructure-procédé-propriété sont décrits pour les composites polymères utilisés dans le transport, le sport et l'énergie.

MSE-424: Fracture of materials

This course covers elementary fracture mechanics and its application to the fracture of engineering materials.