Development of Nonwoven Preforms Made of Pure Recycled Carbon Fibres (rCF) for Applications of Composite Materials

2017 ◽  
Vol 742 ◽  
pp. 555-561 ◽  
Author(s):  
Marcel Hofmann ◽  
Dirk Wenzel ◽  
Bernd Gulich ◽  
Heike Illing-Günther ◽  
Daisy Nestler
Keyword(s):  
Carbon Fibre ◽  
Woven Fabric ◽  
Fibre Material ◽  
Carbon Fibres ◽  
Carbon Fibre Material ◽  
Textile Processing ◽  
Reinforced Plastics ◽  
Laser Systems ◽  
Sewing Threads ◽  
Fabric Production

For the development of an efficient and economic recycling process of carbon fibers (CF) still many technological challenges have to be mastered. One of them is the removal of all extraneous natural and synthetic fibres, e.g. polyester sewing threads. The objective of the research was to develop an in-line process for the removal of those extraneous fibres, which result from mechanical processes such as tearing. A promising approach for the removal of extraneous fibres from cut-off carbon-fibre material (CF) has been identified, getting recycled carbon fibres (rCF). For that purpose, the use of modern laser technologies is particularly promising. However, the focus was not the development of new laser systems, but the adaptation of existing technologies and their integration into textile processing steps for carbon fibre recycling. In addition to the removal of the extraneous fibres, the degree of CF losses and quality degradation due to fibre damage have been analysed and compared with optimum fibre characteristics. The separation has been experimented and corresponding laser parameters have been defined. Finally, the obtained carbon-fibre material has been tested with regard to its processability in textile manufacturing processes (dry non-woven fabric production) up to carbon fibre reinforced plastics (CFRP). For the evaluation of the material for potential applications, test plates from irradiated and non-irradiated material have been used. The performed tensile and flexural tests have proved that the irradiated material has similar properties compared to the non-exposed one.

Features of the structure of carbon fibres used as filler for carbon-fibre-reinforced plastics

2010 ◽  
Vol 42 (3) ◽  
pp. 171-174
Author(s):  
E. G. Belyakova ◽  
B. S. Kogan ◽  
V. G. Pushin ◽  
N. V. Nikolaeva
Keyword(s):  
Carbon Fibre ◽  
Carbon Fibres ◽  
Reinforced Plastics ◽  
Carbon Fibre Reinforced Plastics

Development of a Novel Textile Process for the Production of Highly Oriented Nonwovens Made from Recycled Carbon Fibres

2019 ◽  
Vol 809 ◽  
pp. 527-532
Author(s):  
Michael Petrich ◽  
Christoph Hoffmeister ◽  
Axel Herrmann
Keyword(s):  
Carbon Fibre ◽  
Process Parameters ◽  
Design Of Experiment ◽  
High Performance ◽  
Statistical Design ◽  
Process Window ◽  
Carbon Fibres ◽  
Research Project ◽  
Reinforced Plastics ◽  
Carbon Fibre Reinforced Plastics

Carbon fibre reinforced plastics (CRFP) are high performance materials with an outstanding lightweight potential. Recycling applications for production waste though, are still scarce and not fully established. In the CaroLIn (carbon fibre nonwovens optimised for aircraft interior components) research project a novel aerodynamic textile process is developed, in order to produce highly orientated non-wovens form recycled carbon fibres. In the first stage of the project a laboratory plant for the orientation of fibres has been constructed and implemented. Afterwards a process window has been defined and a number of process parameters identified. The influence of those parameters was then investigated, using the statistical design of experiment (DOE) method.

scholarly journals Development of a new hybrid yarn construction from recycled carbon fibres for high-performance composites: Part IV: Measurement of recycled carbon fibre length

2020 ◽  
Vol 15 ◽  
pp. 155892502091072
Author(s):  
Martin Hengstermann ◽  
Karl Kopelmann ◽  
Andreas Nocke ◽  
Anwar Abdkader ◽  
Chokri Cherif
Keyword(s):  
Carbon Fibre ◽  
High Performance ◽  
Fibre Length ◽  
Reference Method ◽  
Single Fibre ◽  
Measuring System ◽  
Carbon Fibres ◽  
Reinforced Plastics ◽  
Hybrid Yarn ◽  
Reference Length

Due to the increasing application of carbon fibre–reinforced plastics, the use of recycled carbon fibres can help reduce the tremendous amount of carbon fibre waste growing worldwide. In this context, the processing of longer recycled carbon fibres (>40 mm mean length) into hybrid yarn constructions offers a promising solution. The characterisation of recycled carbon fibre length is essential for textile processes. However, to suit the atypical fibre characteristics of recycled carbon fibres compared to standard natural or man-made-fibres, the development of an adequate measuring technique is required. Investigations on the state of the art suggest that an adapted fibrograph method might pose an appropriate measuring system. Therefore, new test equipment and an alternative image analysing method based on pixel greyscale values were developed. To enable a calibration process, different samples with cut carbon fibre from carded and drafted slivers were intensively tested and compared. In addition, an adapted reference method was investigated by combining single fibre measurement and image processing techniques. In a final step, recycled carbon fibres samples with unknown fibre length were tested. Results proved that the presented measuring system is adequate for the testing of longer recycled carbon fibres in webs or slivers. All measured values were close to the measured reference length values (deviation ±4%).

scholarly journals An Overview of Impregnation Methods for Carbon Fibre Reinforced Thermoplastics

2017 ◽  
Vol 742 ◽  
pp. 473-481 ◽  
Author(s):  
Thomas Köhler ◽  
Tim Röding ◽  
Thomas Gries ◽  
Gunnar Seide
Keyword(s):  
Carbon Fibre ◽  
High Performance ◽  
Fibre Production ◽  
Matrix Composites ◽  
Carbon Fibres ◽  
Reinforced Plastics ◽  
Thermoplastic Matrix ◽  
Economic Production ◽  
The Matrix ◽  
Reinforced Thermoplastics

Carbon fibre reinforced plastics (CFRPs) can be classified according to whether the matrix is a thermoset or a thermoplastic. Thermoset-matrix composites are by tradition far more common, but thermoplastic-matrix composites are gaining in importance. There are several techniques for combining carbon fibres with a thermoplastic-matrix system. The composite’s characteristics as well as its manufacturing costs are dependent on the impregnation technique of the carbon fibre and the textile structure respectively. Carbon fibre reinforced thermoplastics (CFRTPs) are suitable for fast and economic production of high-performance components. Despite the higher material costs thermoplastic-matrix systems show cost benefits in comparison to thermoset-matrix due to substantial time savings in the production process. Moreover CFRTPs can be manufactured in large production runs. The commingling of reinforcement fibres with matrix fibres is a well-established process. Another approach is the coating of the carbon fibre with a thermoplastic subsequent to the carbon fibre production (carbonization, activation and deposition of sizing). The latter point is currently subject of research and is a promising method for further increasing the production speed. This paper presents the different possibilities of impregnating carbon fibres with a thermoplastic matrix. Diverse technologies along the process chain of the CFRTP production will be discussed.

scholarly journals Numerical modelling of entangled carbon fibre material under compression

2018 ◽  
Vol 151 ◽  
pp. 14-24 ◽  
Author(s):  
Fadhel Chatti ◽  
Dominique Poquillon ◽  
Christophe Bouvet ◽  
Guilhem Michon
Keyword(s):  
Numerical Modelling ◽  
Carbon Fibre ◽  
Fibre Material ◽  
Carbon Fibre Material

Analysis of open Coil Helical Spring used in Vehicles

2017 ◽  
Vol 3 (10) ◽  
Author(s):  
Sameer Singh ◽  
Shyam Birla ◽  
Neeraj Kumar Nagaych
Keyword(s):  
Titanium Alloy ◽  
Carbon Fibre ◽  
Dynamic Loading ◽  
Spring Steel ◽  
Fibre Material ◽  
Helical Spring ◽  
Carbon Fibre Material ◽  
Suspension Spring ◽  
Steel Material

 In this paper suspension spring of a 160cc 2-wheeler is analyzed and optimized for its performance. For this study the diameter and the material of the coil wire for suspension is changed and its effect is noted. In this study three materials were studied that is ASTM A227 hard drawn spring steel material, carbon fibre Material and titanium alloy. The results were obtained for all of these materials and based on the results it can be said that spring made of carbon fibre material gives the best results. The springs were tested under both static as well as dynamic loading, and in all of the tests Carbon fibre spring proved to be best.

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