Mechanical Properties, Surface Assessment, and Structural Analysis of Functionalized CFRPs after Accelerated Weathering

The present study focuses on the effect of two novel carbon fibre surface treatments, electropolymerisation of methacrylic acid and air pressure plasma, on the mechanical properties and structural integrity of carbon-fibre-reinforced composites under operational conditions. Extensive mechanical testing was applied, both in nano- and macro-scale, to assess the performance of the composites and the interphase properties after ultraviolet/humidity weathering. The results of the mechanical assessment are supported by structure, surface, and chemistry examination in order to reveal the failure mechanism of the composites. Composites with the electropolymerisation treatment exhibited an increase of 11.8% in interlaminar shear strength, while APP treatment improved the property of 23.9%, rendering both surface treatments effective in increasing the fibre-matrix adhesion. Finally, it was proven that the developed composites can withstand operational conditions in the long term, rendering them suitable for a wide variety of structural and engineering applications.

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Improved Mechanical Properties of Copoly(Phthalazinone Ether Sulphone)s Composites Reinforced by Multiscale Carbon Fibre/Graphene Oxide Reinforcements: A Step Closer to Industrial Production

Polymers ◽

10.3390/polym11020237 ◽

2019 ◽

Vol 11 (2) ◽

pp. 237 ◽

Cited By ~ 7

Author(s):

Nan Li ◽

Xiuxiu Yang ◽

Feng Bao ◽

Yunxing Pan ◽

Chenghao Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Graphene Oxide ◽

Carbon Fibre ◽

Photoelectron Spectroscopy ◽

Fibre Surface ◽

Homogeneous Distribution ◽

Matrix Interface ◽

Atomic Force ◽

Hybrid Fibre ◽

Interlaminar Shear

The properties of carbon fibre (CF) reinforced composites rely heavily on the fibre-matrix interface. To enhance the interfacial properties of CF/copoly(phthalazinone ether sulfone)s (PPBES) composites, a series of multiscale hybrid carbon fibre/graphene oxide (CF/GO) reinforcements were fabricated by a multistep deposition strategy. The optimal GO loading in hybrid fibres was investigated. Benefiting from the dilute GO aqueous solution and repeated deposition procedures, CF/GO (0.5%) shows a homogeneous distribution of GO on the hybrid fibre surface, which is confirmed by scanning electron microscopy, atomic force microscope, and X-ray photoelectron spectroscopy, thereby ensuring that its PPBES composite possesses the highest interlaminar shear strength (91.5 MPa) and flexural strength (1886 MPa) with 16.0% and 24.1% enhancements, respectively, compared to its non-reinforced counterpart. Moreover, the incorporation of GO into the interface is beneficial for the hydrothermal ageing resistance and thermo-mechanical properties of the hierarchical composite. This means that a mass production strategy for enhancing mechanical properties of CF/PPBES by regulating the fiber-matrix interface was developed.

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Experiments to relate carbon-fibre surface treatments to composite mechanical properties

Composites Science and Technology ◽

10.1016/s0266-3538(99)00067-6 ◽

1999 ◽

Vol 59 (14) ◽

pp. 2101-2113 ◽

Cited By ~ 48

Author(s):

C Ageorges

Keyword(s):

Mechanical Properties ◽

Carbon Fibre ◽

Fibre Surface ◽

Surface Treatments

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Up-cycling of agave tequilana bagasse-fibres: A study on the effect of fibre-surface treatments on interfacial bonding and mechanical properties

Results in Materials ◽

10.1016/j.rinma.2020.100158 ◽

2020 ◽

Vol 8 ◽

pp. 100158

Author(s):

Omar Huerta-Cardoso ◽

Isidro Durazo-Cardenas ◽

Veronica Marchante-Rodriguez ◽

Phil Longhurst ◽

Frederic Coulon ◽

...

Keyword(s):

Mechanical Properties ◽

Fibre Surface ◽

Surface Treatments ◽

Interfacial Bonding ◽

Agave Tequilana

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Carbonaceous Materials Coated Carbon Fibre Reinforced Polymer Matrix Composites

Polymers ◽

10.3390/polym13162771 ◽

2021 ◽

Vol 13 (16) ◽

pp. 2771 ◽

Cited By ~ 3

Author(s):

Bidita Salahuddin ◽

Shaikh N. Faisal ◽

Tajwar A. Baigh ◽

Mohammed N. Alghamdi ◽

Mohammad S. Islam ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Fibre ◽

Colloidal Particles ◽

Polymer Matrix Composites ◽

Matrix Material ◽

Fibre Surface ◽

Coating Materials ◽

Reinforced Polymer ◽

Carbon Fibre Reinforced Polymer ◽

Fibre Reinforced Polymer

Carbon fibre reinforced polymer composites have high mechanical properties that make them exemplary engineered materials to carry loads and stresses. Coupling fibre and matrix together require good understanding of not only fibre morphology but also matrix rheology. One way of having a strongly coupled fibre and matrix interface is to size the reinforcing fibres by means of micro- or nanocarbon materials coating on the fibre surface. Common coating materials used are carbon nanotubes and nanofibres and graphene, and more recently carbon black (colloidal particles of virtually pure elemental carbon) and graphite. There are several chemical, thermal, and electrochemical processes that are used for coating the carbonous materials onto a carbon fibre surface. Sizing of fibres provides higher interfacial adhesion between fibre and matrix and allows better fibre wetting by the surrounded matrix material. This review paper goes over numerous techniques that are used for engineering the interface between both fibre and matrix systems, which is eventually the key to better mechanical properties of the composite systems.

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Advantage of the scanning tunnelling microscope in documenting changes in carbon fibre surface morphology brought about by various surface treatments

Journal of Materials Science ◽

10.1007/bf00612388 ◽

1991 ◽

Vol 26 (17) ◽

pp. 4545-4553 ◽

Cited By ~ 52

Author(s):

W. P. Hoffman ◽

W. C. Hurley ◽

T. W. Owens ◽

H. T. Phan

Keyword(s):

Surface Morphology ◽

Carbon Fibre ◽

Fibre Surface ◽

Surface Treatments ◽

Scanning Tunnelling Microscope ◽

Scanning Tunnelling

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Effects on Plasticity and Structural Integrity of Tube Expansion

Volume 3: Design and Analysis ◽

10.1115/pvp2012-78654 ◽

2012 ◽

Cited By ~ 2

Author(s):

Rashid Khan ◽

Tasneem Pervez ◽

Sayyad Zahid Qamar

Keyword(s):

Mechanical Properties ◽

Structural Integrity ◽

Equivalent Plastic Strain ◽

Cost Effective ◽

Oil Well ◽

Strain Rates ◽

Expansion Process ◽

Cold Expansion ◽

Operational Conditions ◽

Tube Expansion

This paper presents an investigation of the effects of cold expansion on plasticity and structural integrity of expandable tubulars. Down-hole tubular expansion has proven itself to be a vital technology in oil well applications. One of the challenges faced by researchers and field engineers in implementing and making down-hole tubular expansion technology cost effective is to conserve the structural integrity of tubular after the expansion process. Cold expansion affects the mechanical properties and induces residual stresses in the tubular, which could reduce its collapse, burst and fatigue ratings. Hence, a knowledge of variation of properties is required in correctly predicting the life span of tubular under given operational conditions. Cold expansion of tubulars under down-hole conditions is simulated at different strain rates using finite element method. The strain rates are varied by changing the velocity of mandrel used to expand the tubular. It is found that there are variations in contact pressure at tubular-mandrel interface, effective stress, equivalent plastic strain and thickness reduction during expansion process. These variations ultimately influence post-expansion properties of the tubular particularly the collapse and burst strengths, and hence its structural integrity. However, length shortening and surplus deformation have negligible effect on post-expansion properties of tubular.

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Comparison of short carbon fibre surface treatments on epoxy composites

Composites Science and Technology ◽

10.1016/j.compscitech.2004.02.009 ◽

2004 ◽

Vol 64 (13-14) ◽

pp. 2021-2029 ◽

Cited By ~ 86

Author(s):

Hui Zhang ◽

Zhong Zhang ◽

Claudia Breidt

Keyword(s):

Carbon Fibre ◽

Fibre Surface ◽

Surface Treatments ◽

Epoxy Composites ◽

Short Carbon

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Effects of temperature profiles of microwave curing processes on mechanical properties of carbon fibre–reinforced composites

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/0954405415596142 ◽

2015 ◽

Vol 231 (8) ◽

pp. 1332-1340 ◽

Cited By ~ 8

Author(s):

Xiang Hang ◽

Yingguang Li ◽

Xiaozhong Hao ◽

Nanya Li ◽

Youyi Wen

Keyword(s):

Mechanical Properties ◽

Carbon Fibre ◽

Curing Kinetics ◽

Temperature Profiles ◽

Heating Rates ◽

Microwave Curing ◽

Interlaminar Shear ◽

Compressive And Flexural Strengths ◽

Mechanical Performances ◽

Manufacturing Time

The microwave curing of composites is a promising technology to manufacture the composite components faster than conventional thermal curing. But how the shortened temperature profiles, which determine the duration of microwave curing processes, will affect the outcome of cured parts is still not clear. In this study, the effects of microwave curing processes governed by different temperature profiles on the mechanical properties of carbon fibre–reinforced composite material have been experimentally investigated. The results showed that microwave-cured composites have similar curing kinetics as the conventional thermally cured ones, and they were better in interlaminar shear and flexural strengths than thermally cured ones, while slightly lower in tensile and compressive strengths. The increase in heating rates in the temperature profiles enhanced the compressive and flexural strengths of the composites within a certain range, but moderately compromised the tensile and interlaminar strengths; the reduction in holding time can decrease the mechanical performances of the composites moderately, except for the interlaminar shear strength. The micrographs of the fracture surfaces after the interlaminar shear tests demonstrated the enhancing effect of microwave curing on the fibre–matrix interfacial bonding, but this effect can be slightly compromised when increasing the heating rates. These results could serve for the tradeoffs between reducing the manufacturing time and preserving the mechanical properties of the microwave-cured composites.

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