Applications research in ultrasonic testing of carbon fiber composite based on an optical fiber F-p sensor

2016 ◽  
Author(s):  
Ning Shan
2014 ◽  
Vol 610 ◽  
pp. 205-208
Author(s):  
Sang Sang Yu ◽  
Hui Feng Zheng ◽  
Wang Cheng ◽  
Ting Hao Tang

In order to overcome the limitations of conventional ultrasonic testing method to detect small defects of carbon fiber composite material, ultrasonic nonlinear detection method was proposed based on finite amplitude. Firstly the detection mechanism of finite amplitude method was studied, then the detection model was created, and ultrasonic nonlinear characteristics of carbon fiber composites was analyzed by finite element simulation, finally relative non-linear coefficients follow the change of defect length and width show that the finite amplitude method has a high sensitivity to detect small defects.


2008 ◽  
Author(s):  
Andrew Littlefield ◽  
Edward Hyland ◽  
Jack Keating

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1319 ◽  
Author(s):  
Ran Li ◽  
Huiping Lin ◽  
Piao Lan ◽  
Jie Gao ◽  
Yan Huang ◽  
...  

Lightweight electromagnetic interference shielding cellulose foam/carbon fiber composites were prepared by blending cellulose foam solution with carbon fibers and then freeze drying. Two kinds of carbon fiber (diameter of 7 μm) with different lengths were used, short carbon fibers (SCF, L/D = 100) and long carbon fibers (LCF, L/D = 300). It was observed that SCFs and LCFs built efficient network structures during the foaming process. Furthermore, the foaming process significantly increased the specific electromagnetic interference shielding effectiveness from 10 to 60 dB. In addition, cellulose/carbon fiber composite foams possessed good mechanical properties and low thermal conductivity of 0.021–0.046 W/(m·K).


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