Mechanical properties of pultruded carbon fibre-reinforced polymer (CFRP) plates at elevated temperatures

2011 ◽  
Vol 33 (7) ◽  
pp. 2154-2161 ◽  
Author(s):  
Ke Wang ◽  
Ben Young ◽  
Scott T. Smith
Keyword(s):  
Mechanical Properties ◽  
Carbon Fibre ◽  
Elevated Temperatures ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

scholarly journals Toughening mechanism of carbon fibre-reinforced polymer laminates containing inkjet-printed poly(methyl methacrylate) microphases

2017 ◽  
Vol 52 (11) ◽  
pp. 1567-1576 ◽  
Author(s):  
Yi Zhang ◽  
Jonathan Stringer ◽  
Alma Hodzic ◽  
Patrick J Smith
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Carbon Fibre ◽  
Spherical Shape ◽  
Energy Minimisation ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Toughness Testing ◽  
Polymer Laminates

It has previously been demonstrated that inkjet-printed thermoplastic microphases are capable of producing a significant increase in mode I interlaminar fracture toughness ( G Ic) in carbon fibre-reinforced polymer with no significant reduction in other mechanical properties or increase in parasitic weight. In this work, the evolution of the microphase structure during processing and how this is influenced by the chosen printing parameters were investigated. Samples were prepared that enabled monitoring of the microphases during all steps of fabrication, with the thermoplastic polymer found to form a discrete spherical shape due to surface energy minimisation. Based upon the morphology and properties of the thermoplastic microphases, it was hypothesised that the increased toughness was due to a combination of crack deflection and plastic deformation of the microphases. Samples were produced for the double cantilever beam fracture toughness testing using the same printing conditions, and both G Ic values and scanning electron microscopy of the fracture surface supported the proposed hypothesis. The feasibility of selective toughening is also demonstrated, which presents potential to tailor the mechanical properties of the carbon fibre-reinforced polymer spatially.

scholarly journals Carbonaceous Materials Coated Carbon Fibre Reinforced Polymer Matrix Composites

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2771 ◽  
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.

Mechanical properties of carbon fibre-reinforced polymer/magnesium alloy hybrid laminates

2018 ◽  
Vol 5 (4) ◽  
pp. 046523 ◽  
Author(s):  
Pengpeng Zhou ◽  
Xuan Wu ◽  
Yingcai Pan ◽  
Ye Tao ◽  
Guoqing Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Carbon Fibre ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Hybrid Laminates ◽  
Fibre Reinforced Polymer

Protection of reinforced concrete beams retrofitted by carbon fibre-reinforced polymer composites against elevated temperatures

2010 ◽  
Vol 37 (9) ◽  
pp. 1171-1178 ◽  
Author(s):  
H. Elkady ◽  
A. Hasan
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Fire Test ◽  
Elevated Temperatures ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fire Tests ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

This paper presents the outcome of the first part of a 3 year project aiming to investigate the effect of elevated temperatures on carbon fibre-reinforced polymer (CFRP) retrofitted structures. Accordingly, different protecting mixes to be used as thermal insulating covers were proposed and evaluated. This experimental program addresses a series of indirect fire tests on reinforced concrete beams retrofitted with CFRP laminates exposed to a temperature of 900 °C (1652 °F) after being protected with ten types of special mortar covers. Materials known for their low coefficient of thermal conductivity were added in certain ratios to form mortars for these protective covers. Tests were carried out in a test furnace designed to produce the standard temperature–time curve specified in ASTM E119–95a. Scale effect was considered by proper adjustment of the exposure time to fire test. Temperature at the CFRP level, just below the protecting covers, was monitored to determine the efficiency of the covers in reducing heat transfer during the fire test. Furthermore, mechanical bending load tests were performed on specimens before and after fire tests to determine reduction in flexure failure load of the specimens due to indirect fire exposure. This reduction was found to vary from 10% to 48% for different tested coatings. In spite of the high damage in the protection covers expressing the lowest performance, reinforced concrete beams were still unaffected and could be restrengthened to return to their original status. Recommendations showing proper thicknesses of application and necessary precautions to be taken when using CFRP in retrofitting reinforced concrete structures to enhance their fire resistance were presented.

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