Smart Structure for Identification of Delamination of Quasi-isotropic CFRP Plates Using Electric Resistance Change

2000 ◽  
Vol 2000.1 (0) ◽  
pp. 89-90
Author(s):  
Akira TODOROKI ◽  
Hiroshi SUZUKI ◽  
Yoshinobu SHIMAMURA ◽  
Hideo KOBAYASHI
Keyword(s):  
Smart Structure ◽  
Electric Resistance ◽  
Resistance Change

A Study on Thermal and Electrical Conductivities of Ethylene-Butene Copolymer Composites with Carbon Fibers

2021 ◽  
Vol 36 (4) ◽  
pp. 417-422
Author(s):  
Y. Hamid ◽  
P. Svoboda
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Electric Conductivity ◽  
Carbon Fibers ◽  
Mechanical Strain ◽  
Electric Resistance ◽  
Resistance Change ◽  
Electrical Conductivities ◽  
Fiber Sample

Abstract Ethylene-butene copolymer (EBC)/carbon-fiber (CF) composites can be utilized as an electromechanical material due to their ability to change electric resistance with mechanical strain. The electro-mechanical properties and thermal conductivity of ethylene butene copolymer (EBC) composites with carbon fibers were studied. Carbon fibers were introduced to EBC with various concentrations (5 to 25 wt%). The results showed that carbon fibers’ addition to EBC improves the electric conductivity up to 10 times. Increasing the load up to 2.9 MPa will raise the electric resistance change by 4 500% for a 25% fiber sample. It is also noted that the EBC/CF composites’ electric resistance underwent a dramatic increase in raising the strain. For example, the resistance change was around 13 times higher at 15% strain compared to 5% strain. The thermal conductivity tests showed that the addition of carbon fibers increases the thermal conductivity by 40%, from 0.19 to 0.27 Wm–1K–1.

scholarly journals Carbon Fibre/Silicon Composite Sensors for Concrete Structural Health Monitoring in Compression

2012 ◽  
Vol 5 ◽  
pp. 224-229
Author(s):  
Li Li Yang ◽  
Yong Quan Zhang ◽  
Yong Ge ◽  
Qing Hua Zhu ◽  
Ce Zhang
Keyword(s):  
Structural Health Monitoring ◽  
Carbon Fibre ◽  
Health Monitoring ◽  
Low Cost ◽  
Electric Resistance ◽  
Compression Process ◽  
Resistance Change ◽  
Structural Health ◽  
Rubber Composite ◽  
Fibre Fraction

Structural health monitoring of concrete infrastructures has attracted enormous attention due to the brittle nature of concrete. In this research, we report the carbon fibre/silicon rubber composite sensors and their excellent monitoring in concrete’s compression. It is shown that the electric resistance change synchronously with the mechanical deformation of concrete during the compression process. With the increase of carbon fibre fraction, the sensitivity decreases and the numerical equations to predict the structural change are also obtained. The experimental results reported here highlight the potential application of CF/silicon composites as an effective, real-time structural monitoring sensor with low-cost and long life.

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