Characterizing the fibre/matrix interface of carbon fibre-reinforced composites using a single fibre pull-out test

Composites ◽  
1990 ◽  
Vol 21 (5) ◽  
pp. 389-395 ◽  
Author(s):  
M.J Pitkethly ◽  
J.B Doble
Keyword(s):  
Carbon Fibre ◽  
Single Fibre ◽  
Reinforced Composites ◽  
Matrix Interface ◽  
Pull Out ◽  
Fibre Matrix ◽  
Fibre Reinforced Composites

Fibre-Matrix Interface Development during High Temperature Exposition of Long Fibre Reinforced SiOC Matrix

2013 ◽  
Vol 592-593 ◽  
pp. 401-404
Author(s):  
Zdeněk Chlup ◽  
Martin Černý ◽  
Adam Strachota ◽  
Martina Halasova ◽  
Ivo Dlouhý
Keyword(s):  
High Temperature ◽  
Crack Formation ◽  
Fracture Behaviour ◽  
Point Of View ◽  
Reinforced Composites ◽  
Matrix Interface ◽  
Significant Damage ◽  
The Matrix ◽  
Fibre Matrix ◽  
Fibre Reinforced Composites

The fracture behaviour of long fibre reinforced composites is predetermined mainly by properties of fibre-matrix interface. The matrix prepared by pyrolysis of polysiloxane resin possesses ability to resist high temperatures without significant damage under oxidising atmosphere. The application is therefore limited by fibres and possible changes in the fibre matrix interface. The study of development of interface during high temperature exposition is the main aim of this contribution. Application of various techniques as FIB, GIS, TEM, XRD allowed to monitor microstructural changes in the interface of selected places without additional damage caused by preparation. Additionally, it was possible to obtain information about damage, the crack formation, caused by the heat treatment from the fracture mechanics point of view.

scholarly journals Micromechanical Tests on Natural Fibre Composites with Enzymatically Enhanced Fibre–Matrix Adhesion

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Hanna M. Brodowsky ◽  
Anne Hennig
Keyword(s):  
Shear Strength ◽  
Single Fibre ◽  
Natural Fibre ◽  
Interfacial Shear ◽  
Frictional Stress ◽  
Reinforced Composites ◽  
Fragmentation Test ◽  
Fibre Pullout ◽  
Fibre Matrix ◽  
Fibre Reinforced Composites

Abstract Natural fibre–reinforced composites are more sustainable than other composites with respect to the raw materials. Their properties are attractive due to high specific properties, and especially so wherever high damping is valued. As the interphase between fibre and matrix is the region of highest stresses, a strong bond between fibre and matrix is essential for any composites’ properties. The present study compares two methods of determining the interfacial shear stress in natural fibre–reinforced composites: the single fibre fragmentation test and the single fibre pullout test. The studied composites are flax fibre reinforced epoxy. For a variety of fibre–matrix interaction, the fibres are treated with a laccase enzyme and dopamine, which is known to improve the fibre–matrix shear strength. In the observed samples, single fibre fragmentation test data, i.e. of fracture mode and fragment length, scatter when compared to pullout data. In single fibre pullout tests, the local interfacial shear strength showed a 30% increase in the laccase-treated samples, compared to the control samples. The method also permitted an evaluation of the frictional stress occurring after surface failure.

scholarly journals Electrolytic Surface Treatment for Improved Adhesion between Carbon Fibre and Polycarbonate

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2253 ◽  
Author(s):  
Jan Henk Kamps ◽  
Luke Henderson ◽  
Christina Scheffler ◽  
Ruud van der Heijden ◽  
Frank Simon ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Surface Characteristics ◽  
Fibre Surface ◽  
Single Fibre ◽  
Optimum Level ◽  
Pull Out ◽  
Force Displacement ◽  
Fibre Matrix

To achieve good mechanical properties of carbon fibre-reinforced polycarbonate composites, the fibre-matrix adhesion must be dialled to an optimum level. The electrolytic surface treatment of carbon fibres during their production is one of the possible means of adapting the surface characteristics of the fibres. The production of a range of tailored fibres with varying surface treatments (adjusting the current, potential, and conductivity) was followed by contact angle, inverse gas chromatography and X-ray photoelectron spectroscopy measurements, which revealed a significant increase in polarity and hydroxyl, carboxyl, and nitrile groups on the fibre surface. Accordingly, an increase in the fibre-matrix interaction indicated by a higher interfacial shear strength was observed with the single fibre pull-out force-displacement curves. The statistical analysis identified the correlation between the process settings, fibre surface characteristics, and the performance of the fibres during single fibre pull-out testing.

scholarly journals A Method to Measure the Interfacial Shear Stress for Optical Fibres Embedded in Fibre Reinforced Composites

2002 ◽  
Vol 11 (5) ◽  
pp. 096369350201100 ◽  
Author(s):  
J A Etches ◽  
G F Fernando
Keyword(s):  
Interfacial Shear Stress ◽  
Single Fibre ◽  
Interfacial Shear ◽  
Optical Fibres ◽  
Reinforced Composites ◽  
Interfacial Bond ◽  
Interfacial Bond Strength ◽  
Pull Out ◽  
Unidirectional Glass ◽  
Fibre Reinforced Composites

This paper reports on the development of a prepreg-based fabrication technique to manufacture single fibre pull-out test specimens for conducting interfacial bond strength studies. Optical fibres were embedded in 2 and 16-ply unidirectional glass fibre prepreg and processed in an autoclave using conventional procedures. Fibre pull-out tests were conducted on these specimens and the data obtained are comparable to those reported in the literature.

Influence of cutting speed and tool geometry on form and machine tapping of carbon fibre-reinforced composites

2021 ◽  
Vol 43 (2) ◽  
Author(s):  
Sérgio Luiz Moni Ribeiro Filho ◽  
Túlio Hallak Panzera ◽  
Lincoln Cardoso Brandão ◽  
Alexandre Mendes Abrão
Keyword(s):  
Carbon Fibre ◽  
Cutting Speed ◽  
Tool Geometry ◽  
Reinforced Composites ◽  
Fibre Reinforced Composites

Mechanical unfolding of a fluorescent protein enables self-reporting of damage in carbon-fibre-reinforced composites

2014 ◽  
Vol 2 (17) ◽  
pp. 6231 ◽  
Author(s):  
Samuel Lörcher ◽  
Thomas Winkler ◽  
Katarzyna Makyła ◽  
Claudiane Ouellet-Plamondon ◽  
Ingo Burgert ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Fluorescent Protein ◽  
Reinforced Composites ◽  
Fibre Reinforced Composites

scholarly journals CARBON FIBRE ALIGNMENT FOR REINFORCED COMPOSITES USING EMBROIDERY TECHNOLOGY

2021 ◽  
Vol 2021 ◽  
pp. 102-108
Author(s):  
J. Domenech-Pastor ◽  
P. Diaz-Garcia ◽  
D. Garcia
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Carbon Fibre ◽  
Carbon Fibers ◽  
Vertical Direction ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Reinforced Composites ◽  
Good Opportunity ◽  
Fibre Reinforced Composites

Composites are materials formed by the combination of two or more components that acquire better properties than the ones obtained by each component on its own. Composites have been widely used in the industry due to its light weight and good mechanical properties. To improve these properties several layers of reinforced material (e.g., carbon fibre) are overlapped which produce an increase in the fibre consumption. In this sense Tailored Fibre Placement (TFP) embroidery can offer good opportunity to reduce the consumption of reinforced fibre while improving the mechanical properties due to the alignment of the fibres in the effort direction. This study analyzes the performance of carbon fibre reinforced composites with Polyester resin made with TFP embroidery technology against flexural strength efforts and without using plain woven fabrics to demonstrate that the use of reinforcement fabrics in composites can be optimized by a curved alignment of the fibers. Two different structures were embroidered with TFP technology, one simulating a woven fabric with straight unidirectional alignment of fibres in horizontal and vertical direction, and a second structure made with curvilinear alignment of carbon fibers. After the study of the flexural mechanical properties an improvement of 18% was obtained in maximum flexural strength.

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