scholarly journals Comparison of Electrical Contacting Techniques to Carbon Fiber Reinforced Plastics for Self-Strain-Sensing Applications

2021 ◽  
Vol 7 (4) ◽  
pp. 81
Author(s):  
Patrick Scholle ◽  
Sören Rüther ◽  
Michael Sinapius
Keyword(s):  
Carbon Fiber ◽  
Contact Resistance ◽  
Carbon Fibers ◽  
Electrical Contact ◽  
Surface Preparation ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The electrical conductivity of carbon fibers can be used to enable the design of intrinsically smart carbon fiber reinforced plastics (CFRPs). Resistance and impedance measurements of the structural material itself can then be used to measure physical stimuli such as strain or damage without requiring a dedicated sensor to be installed. Measuring the resistance with high precision requires good electrical contact between the measurement equipment and the conductive carbon fibers. In the literature, many different combinations of surface contacting material and surface preparation procedures are used, but only seldomly compared to one another. This article aims to compare frequently used electrical contact methods by analyzing their contact resistance to a pultruded CFRP rod. Furthermore, this study explores the change of contact resistance with increasing mechanical strain. The results show that contact resistance is highly dependent on both the material used for contacting the fibers as well as the surface preparation technique. From the combinations analyzed in this article, the electrodeposition in combination with a surface treatment using concentrated sulphuric acid shows the most promising results.

scholarly journals Orthogonal Experimental Analysis and Mechanism Study on Electrochemical Catalytic Treatment of Carbon Fiber-Reinforced Plastics Assisted by Phosphotungstic Acid

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1866
Author(s):  
Chun Pei ◽  
Peiheng Guo ◽  
Ji-Hua Zhu
Keyword(s):  
Carbon Fiber ◽  
Epoxy Resin ◽  
Carbon Fibers ◽  
Phosphotungstic Acid ◽  
Degradation Mechanism ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Preserving the integrity of carbon fibers when recycling carbon-fiber-reinforced plastics (CFRPs) has been unfeasible due to the harsh reaction conditions required to remove epoxy resin matrixes, which adversely affect the properties of carbon fibers. We establish a practicable and environmentally friendly reclamation strategy for carbon fibers. Carbon fibers are recycled from waste CFRPs by an electrochemical catalytic reaction with the assistance of phosphotungstic acid (PA), which promotes the depolymerization of diglycidyl ether of bisphenol A/ethylenediamine (DGEBA/EDA) epoxy resin. The removal rate, mechanical strength, and microstructure of the recycled carbon fibers are analyzed to explore the mechanism of the electrochemical treatment. The influence of three factors—current density, PA concentration, and reaction time—are studied via an orthogonal method. Range analysis and variance analysis are conducted to investigate the significance of the factors. The optimal conditions are determined accordingly. The underlying CFRP degradation mechanism is also investigated.

Characterization of carbon fibers recovered through mechanochemical-enhanced recycling of waste carbon fiber reinforced plastics

2019 ◽  
Vol 26 (10) ◽  
pp. 2688-2703
Author(s):  
Antony Mutua Nzioka ◽  
Bernard Ouma Alunda ◽  
Cao-zheng Yan ◽  
Ye-Jin Sim ◽  
Myung-Gyun Kim ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Piezoresistive Property of Carbon Fiber Reinforced Plastics

2013 ◽  
Vol 575-576 ◽  
pp. 174-178
Author(s):  
Jian Dong Zuo ◽  
Chao Yun Luo
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Strain Sensor ◽  
Interface Morphology ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
Different Content

Carbon fiber reinforced plastics (CFRP) were prepared by manual molding technology and the effect of loading speed on the piezoresistive property of CFPR was discussed. The piezoresistive sensitivity of CFRP with the different content of carbon fibers was contrasted and the interface morphology of CFRP was observed by SEM. The results show that CFRP has the obvious piezoresistive property and it can provide early warning as a kind of strain sensor. The piezoresistive sensitivity of CFRP decreases as the increasing of the content of carbon fibers in CFRP. Moreover the piezoresistive sensitivity of CFRP reduced as the increasing of loading speed. The SEM showed that the interface was good between carbon fibers and epoxy resin.

Characteristics of Carbon-Fiber-Reinforced Plastics (CFRP) and Associated Challenges – Focusing on Carbon-Fiber-Reinforced Thermosetting Resins (CFRTS) for Aircraft

2016 ◽  
Vol 10 (3) ◽  
pp. 300-309 ◽  
Author(s):  
Akihiko Kitano ◽  
◽  
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Aircraft Industry ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Component Design ◽  
Design And Manufacturing ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The characteristics of carbon-fiber-reinforced plastics (CFRP), which are being widely utilized in the aircraft industry as well as other fields, are reviewed, and challenges associated with their increasing application are discussed. The greatest feature of CFRP is that they can be tailor-made by arranging only the necessary amount of carbon fibers in the required directions. The material possesses unique characteristics, including heterogeneity, anisotropy, and a laminated structure, which must be taken into account in each stage of the design and manufacturing processes, including component design, molding, and machining. In particular, the machining stage requires a deeper understanding of the mechanisms involved, and it is hoped that further research and development will take place in this area.

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