Carbon-Nanotube-Film-Based Electrical Impedance Tomography for Structural Damage Detection of Carbon-Fiber-Reinforced Composites

2021 ◽  
Author(s):  
Fuchao Hao ◽  
Shaokai Wang ◽  
Fei Xing ◽  
Min Li ◽  
Tianshu Li ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Damage Detection ◽  
Structural Damage ◽  
Electrical Impedance ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Structural Damage Detection ◽  
Impedance Tomography ◽  
Carbon Fiber Reinforced Composites

scholarly journals Carbon Nanotube Layer for Reduction of Fiber Print-Through in Carbon Fiber Composites

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Joana F. Guedes ◽  
Marta S. S. Martins ◽  
Ramiro Martins ◽  
Nuno Rocha
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Production Method ◽  
Fiber Composites ◽  
Fiber Reinforced Composites ◽  
Carbon Fiber Composites ◽  
Reinforced Composites ◽  
Space Applications ◽  
Scanning Electron Microscopy Morphology ◽  
Carbon Fiber Reinforced Composites

Fiber print-through effect is a limitation to the use of carbon fiber-reinforced composites in space applications, namely, mirror telescopes. Replica method is used for the production of lightweight telescope mirrors. However, this method requires a polished mandrel, increasing considerably the final cost. In this work, we report a cheaper and simpler alternative production method, which consists in the addition of a carbon nanotube filled epoxy resin layer on the surface of carbon reinforced composites, in order to reduce fiber print-through of the materials. The influence of different carbon nanotube functionalizations, concentrations, and dispersion levels are also assessed. The surface properties are evaluated by interferometry (roughness and waviness) and scanning electron microscopy (morphology). The results show that the waviness, roughness, and consequently fiber print-though are considerably reduced with the addition of a thin layer of nonfunctionalized carbon nanotubes.

Increasing Fracture Toughness for 3D Multiscale Carbon Nanotube and Carbon Fiber Reinforced Composites

2016 ◽  
Vol 713 ◽  
pp. 131-134
Author(s):  
Yan Deng ◽  
Li Yong Tong
Keyword(s):  
Fracture Toughness ◽  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Maximum Load ◽  
Fiber Reinforced Composites ◽  
Displacement Curve ◽  
Reinforced Composites ◽  
Carbon Fiber Reinforced Composites ◽  
Hierarchical Carbon

This paper presents a new concept of forming 3D hierarchical carbon nanotube (CNT) and carbon fiber (CF) reinforced composites by using a low temperature grafting method that connects CNTs to CF surface by covalent bonding. By using amorphous carbon to join the free ends of two cantilever CNTs, it is shown via in situ scanning electron microscope (SEM) pulling out experiments that the strengths at the joint between CF-CNT and CNT-CNT junction are high and breakage occurs in CNT itself. This offers evidence that the maximum load in a typical bridging load-displacement curve could be increased, which in turn can potentially increase intralaminar and interlaminar fracture toughness of 3D multiscale CNT-CF reinforced composites.

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