Normal free space coupling of reflection-based fiber Bragg grating sensors embedded in composite materials

2011 ◽  
Author(s):  
Liang Qiu ◽  
Keith W. Goossen ◽  
Dirk Heider ◽  
Daniel J. O'Brien ◽  
Eric D. Wetzel
Keyword(s):  
Composite Materials ◽  
Fiber Bragg Grating ◽  
Free Space ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

Normal free space coupling to fiber Bragg grating sensors

2009 ◽  
Author(s):  
Liang Qiu ◽  
Michael E. Teitelbaum ◽  
Keith W. Goossen ◽  
Dirk Heider ◽  
Daniel J. O'Brien ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Free Space ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

Free space optical coupling to completely embedded fiber Bragg grating sensors

2010 ◽  
Author(s):  
Liang Qiu ◽  
Keith W. Goossen ◽  
Dirk Heider ◽  
Daniel J. O'Brien ◽  
Eric D. Wetzel
Keyword(s):  
Fiber Bragg Grating ◽  
Free Space ◽  
Bragg Grating ◽  
Optical Coupling ◽  
Free Space Optical ◽  
Fiber Bragg Grating Sensors

Experimental analysis of the response of fiber Bragg grating sensors under non-uniform strain field in a twill woven composite

2018 ◽  
Vol 53 (7) ◽  
pp. 893-908 ◽  
Author(s):  
M Kharshiduzzaman ◽  
A Gianneo ◽  
A Bernasconi
Keyword(s):  
Composite Materials ◽  
Digital Image Correlation ◽  
Fiber Bragg Grating ◽  
Digital Image ◽  
Strain Measurement ◽  
Strain Field ◽  
Image Correlation ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
T Matrix

Fiber Bragg grating optical sensors are nowadays widely employed for strain measurement for structural health monitoring and in experimental mechanics. Compared to other techniques, i.e. electrical strain gauges, fiber Bragg grating offer immunity to electromagnetic interference and allow for long transmission lead lines. Moreover, thanks to multiplexing interrogation, several sensors can be photo-imprinted into a single fiber core allowing for strain evaluation at multiple locations simultaneously. They have high adaptability to composite materials, particularly because it is possible to be embedded into laminates without affecting their strength and stiffness. Fiber Bragg grating strain measurements are based on the detection of the wavelength shift of their peak reflected spectrum. However, subjected to strain gradients, the spectral response of fiber Bragg grating sensors may be distorted and the sharp peak may not be retained. In this work, the response of fiber Bragg grating sensors having different grating lengths and bonded to the surface of a carbon fiber-reinforced twill woven laminate was analyzed. The analysis combined transfer matrix (T-matrix) with digital image correlation methods. Digital image correlation technique was used to capture the non-uniform strain fields in the woven composites and measured strains were employed in T-Matrix algorithm to simulate fiber Bragg grating response. Using this approach, the effect of the length of the fiber Bragg grating on the strain measurement is assessed and results discussed. Moreover, it is shown that T-matrix formulation combined with a non-contact strain field measurement technique, as DIC, is an appropriate technique to simulate the behavior of fiber Bragg grating bonded to composite materials of complex microstructure.

scholarly journals Fiber Bragg Grating Sensors toward Structural Health Monitoring in Composite Materials: Challenges and Solutions

Sensors ◽  
2014 ◽  
Vol 14 (4) ◽  
pp. 7394-7419 ◽  
Author(s):  
Damien Kinet ◽  
Patrice Mégret ◽  
Keith Goossen ◽  
Liang Qiu ◽  
Dirk Heider ◽  
...  
Keyword(s):  
Composite Materials ◽  
Structural Health Monitoring ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Bragg Grating ◽  
Structural Health ◽  
Fiber Bragg Grating Sensors

Free space optical coupling of reflection-based fiber Bragg grating sensors

2010 ◽  
Author(s):  
Liang Qiu ◽  
Keith W. Goossen ◽  
Dirk Heider ◽  
Daniel J. O'Brien ◽  
Eric D. Wetzel
Keyword(s):  
Fiber Bragg Grating ◽  
Free Space ◽  
Bragg Grating ◽  
Optical Coupling ◽  
Free Space Optical ◽  
Fiber Bragg Grating Sensors
Sign in / Sign up

Export Citation Format

Share Document