scholarly journals Effect of Carbon Nanotube Deposition Time to the Surface of Carbon Fibres on Flexural Strength of Resistance Welded Carbon Fibre Reinforced Thermoplastics Using Carbon Nanotube Grafted Carbon Fibre as Heating Element

2019 ◽  
Vol 3 (1) ◽  
pp. 9 ◽  
Author(s):  
Kazuto Tanaka ◽  
Takanobu Nishikawa ◽  
Kazuhiro Aoto ◽  
Tsutao Katayama
Keyword(s):  
Shear Strength ◽  
Carbon Nanotube ◽  
Flexural Strength ◽  
Carbon Fibre ◽  
Deposition Time ◽  
Heating Element ◽  
Resistance Heating ◽  
Carbon Fibres ◽  
Lap Shear ◽  
Reinforced Thermoplastics

In recent years, carbon fibre reinforced thermoplastics (CFRTP) are expected to be used as lightweight structural materials for mass-produced vehicles. CFRTP with thermoplastics as matrix allows us to weld them using melting of matrix by heating. We have been developing a direct resistance heating method, which uses carbon fibres as the resistance heating element. Carbon nanotube (CNT) is expected to be used as additive to FRP and we reported that the fibre/matrix interfacial shear strength was improved by grafting CNT on the surface of carbon fibres and tensile lap-shear strength was improved by using CNT grafted carbon fibre as the heating element for welding. For the practical use of CFRTP for structural parts, flexural strength is also necessary to be evaluated. In this study, flexural test was carried out to clarify the effect of CNT deposition time to the surface of carbon fibres on flexural strength of resistance welded CFRTP using CNT grafted carbon fibre as the heating element. The highest flexural strength was obtained when CNT10, for which CNT is grafted on the carbon fibres for deposition time of 10 min, was used for the heating element of resistance welding. In the case of CNT deposition time of 60 min, the lowest flexural strength was obtained because of the poor impregnation of the resin into the carbon fibre due to the excess CNT on the carbon fibres.

Influence of freeze/thaw cycling on the mechanical performance of resistance-welded carbon fibre/polyphenylene sulphide composite joints

2020 ◽  
Vol 39 (21-22) ◽  
pp. 837-851 ◽  
Author(s):  
Vincent Rohart ◽  
Louis L Lebel ◽  
Martine Dubé
Keyword(s):  
Stainless Steel ◽  
Shear Strength ◽  
Carbon Fibre ◽  
Mechanical Performance ◽  
Heating Element ◽  
Lap Shear Strength ◽  
Freeze Thaw ◽  
Lap Shear ◽  
Silane Coating ◽  
Polyphenylene Sulphide

This study evaluates the effects of freeze/thaw cycles on the mechanical performance and failure mode of resistance-welded carbon fibre/polyphenylene sulphide composite joints. Dry and moisture-saturated joints are subjected to 1000 temperature cycles varying between –40°C and 82°C. A silane coating is applied on the stainless steel mesh heating element to improve its adhesion with the polyphenylene sulphide polymer. Results show the limited impact that freeze/thaw cycles have on the lap shear strength of joints welded without any coating on the heating element. The silane coating improves the lap shear strength by 32% when no freeze/thaw cycles are applied to the joints. This improvement of 32% reduces when joints are subjected to freeze/thaw cycles but the mechanical performance remains superior to that of joints welded using uncoated heating element. Fracture surfaces show that fibre/matrix and stainless steel/matrix interfaces are both affected by the environmental conditions although it does not translate into lower lap shear strength.

The Research of the Orgince Silicone Emulsion Hybridized Chromium-Aluminum Phosphate Composites

2013 ◽  
Vol 699 ◽  
pp. 519-523
Author(s):  
Da Qing Chen ◽  
Hai Bin Wang ◽  
Ji Chuan Huo ◽  
Yong Lin Lei ◽  
Wei Ai
Keyword(s):  
Shear Strength ◽  
Flexural Strength ◽  
Aluminum Phosphate ◽  
Lap Shear Strength ◽  
Lap Shear ◽  
Silicone Emulsion ◽  
Chromium Phosphate

In the paper ,the preparation of the orgincesilicone emulsion hybridized chromium-aluminum phosphateand thecomposites was studied.The aluminum-chromium-phosphate washybridizedbyadding the orgincesilicone emulsio-n, the tensile lap-shear strength of the hybridized aluminum-chromium-phosphateincreasedfrom1.2MPato4.0MPaor more, its dielectricconstantwasreducedfromabout 4.0toabout3.6; the flexural strength of the composites was increased from80Mpa tomore than120Mpa and the the moisture rate of the composites reduced to about 1.6%

Synergistic effect of graphene and carbon nanotube on lap shear strength and electrical conductivity of epoxy adhesives

2019 ◽  
Vol 136 (42) ◽  
pp. 48056 ◽  
Author(s):  
Sensen Han ◽  
Qingshi Meng ◽  
Xiao Pan ◽  
Tianqing Liu ◽  
Shuocheng Zhang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Shear Strength ◽  
Carbon Nanotube ◽  
Synergistic Effect ◽  
Lap Shear Strength ◽  
Lap Shear ◽  
Epoxy Adhesives

scholarly journals A novel approach to functionalise pristine unsized carbon fibre using in situ generated diazonium species to enhance interfacial shear strength

2015 ◽  
Vol 3 (7) ◽  
pp. 3360-3371 ◽  
Author(s):  
L. Servinis ◽  
L. C. Henderson ◽  
L. M. Andrighetto ◽  
M. G. Huson ◽  
T. R. Gengenbach ◽  
...  
Keyword(s):  
Shear Strength ◽  
Carbon Fibre ◽  
Interfacial Shear Strength ◽  
Single Fibre ◽  
Interfacial Shear ◽  
Carbon Fibres ◽  
Novel Approach ◽  
Fibre Composites

An in situ diazonium grafting methodology was used to decorate the surface of carbon fibres with pendant amines. This methodology was shown to greatly affect IFSS in single fibre composites.

Effect of Chemical Oxidation on the Interfacial Bonding between Carbon Fibre and Epoxy Resin

2001 ◽  
Vol 9 (5) ◽  
pp. 351-359 ◽  
Author(s):  
Jeng-Shyong Lin ◽  
Ye-Houn Huang ◽  
Hsien-Tang Chiu
Keyword(s):  
Tensile Strength ◽  
Flexural Strength ◽  
Carbon Fibre ◽  
Epoxy Resin ◽  
Chemical Oxidation ◽  
Interfacial Bonding ◽  
Carbon Fibres ◽  
Ferric Ions ◽  
Before And After ◽  
Interlaminar Shear

Polypyrrole (PPy) was deposited on carbon fibres via the oxidation-polymerization of pyrrole (Py) with ferric ions. These PPy-deposited carbon fibres were then made into composite boards with epoxy resin. The interfacial bonding between carbon fibre and epoxy resin was evaluated by measuring the interlaminar shear strength (ILSS), tensile strength before and after impact (TAI), and flexural strength. Experimental results show that deposition of PPy can improve the ILSS, tensile strength, and flexural strength. Furthermore, TAI is also reduced by the deposition of PPy. The interfacial bonding was the highest when the carbon fibre was immersed in 20 wt% FeCl3(aq) and then reacted with 0.5 M Py in acetonitrile for 20 min.

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