Damage Detection in CFRP Bonded Structures by Using Fiber Bragg Grating Sensors as Ultrasonic Wave Receivers

2007 ◽  
pp. 1137-1140
Author(s):  
Nobuo Takeda ◽  
Y. Okabe ◽  
J. Kuwahara ◽  
Toshimichi Ogisu ◽  
Seiji Kojima
Keyword(s):  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Ultrasonic Wave ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

Evaluation of debonding progress in composite bonded structures by ultrasonic wave sensing with fiber Bragg grating sensors

2006 ◽  
Author(s):  
Yoji Okabe ◽  
Junichiro Kuwahara ◽  
Nobuo Takeda ◽  
Toshimichi Ogisu ◽  
Seiji Kojima ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Ultrasonic Wave ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

Damage Detection in CFRP Bonded Structures by Using Fiber Bragg Grating Sensors as Ultrasonic Wave Receivers

2007 ◽  
Vol 334-335 ◽  
pp. 1137-1140
Author(s):  
Nobuo Takeda ◽  
Y. Okabe ◽  
J. Kuwahara ◽  
Toshimichi Ogisu ◽  
Seiji Kojima
Keyword(s):  
Wavelet Transform ◽  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Correlation Coefficient ◽  
Ultrasonic Wave ◽  
Detection System ◽  
Damage Index ◽  
Adhesive Layer ◽  
Ultrasonic Waves ◽  
Bragg Grating

The authors developed a damage detection system that generates ultrasonic waves with a piezo-ceramic actuator and receives them by a fiber Bragg grating (FBG) sensor. In this research, this system was applied to evaluate debonding progress in CFRP skin/stringer bonded structures. FBG sensors were bonded on the stringer or embedded in the adhesive layer. Then, ultrasonic wave at 300kHz was propagated through the debonded region, and the wavelet transform was applied to the received waveform. After that, a new damage indexand a correlation coefficient were calculated from the distribution of the wavelet transform coefficient. As a result, the damage index increased and the correlation coefficient decreased with an increase in the debonded area. Hence the length of the debonding between the skin and the stringer could be well evaluated.

Modal analysis and damage detection by Fiber Bragg grating sensors

2007 ◽  
Vol 133 (2) ◽  
pp. 415-424 ◽  
Author(s):  
P. Capoluongo ◽  
C. Ambrosino ◽  
S. Campopiano ◽  
A. Cutolo ◽  
M. Giordano ◽  
...  
Keyword(s):  
Damage Detection ◽  
Modal Analysis ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

scholarly journals PARAFAC Decomposition for Ultrasonic Wave Sensing of Fiber Bragg Grating Sensors: Procedure and Evaluation

Sensors ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 16388-16411 ◽  
Author(s):  
Rencheng Zheng ◽  
Kimihiko Nakano ◽  
Rui Ohashi ◽  
Yoji Okabe ◽  
Mamoru Shimazaki ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Ultrasonic Wave ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Parafac Decomposition
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