Chinese Journal of Lasers, Volume. 39, Issue 11, 1105004(2012)

Damage Monitoring of the Double-Notched Carbon Fiber Reinforced Polymers with Surface Bonded Chirped Fiber Bragg Grating Sensor

[in Chinese]*
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    Chirped fiber Bragg grating (CFBG) sensors are sensitive to a non-uniform strain distribution along their longitudinal directions, and this effect is manifested in the power spectrum of the reflected light from the gage section. This paper describes a novel technique to monitor the damage of double-notched carbon fiber reinforced polymers (CFRP) lamination using the surface bonded CFBG sensor. The experimental results show that the reflection spectra of the CFBG sensor change distinctively within certain wavelength when the static strains of CFRP reach to 4500 με and 8500 με, which coincides with the strain change point of 8000 με in stress-strain relationship curve of CFRP laminates. The sudden change points of the reflected spectra have an one-to-one correspondence with the location of CFBG. So the proposed approach is useful for predicting the damage states and location of the notch in composite laminates.

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    [in Chinese]. Damage Monitoring of the Double-Notched Carbon Fiber Reinforced Polymers with Surface Bonded Chirped Fiber Bragg Grating Sensor[J]. Chinese Journal of Lasers, 2012, 39(11): 1105004

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    Paper Information

    Category: Optical communication

    Received: Jun. 11, 2012

    Accepted: --

    Published Online: Sep. 26, 2012

    The Author Email: (shaowei9132@sina.com)

    DOI:10.3788/cjl201239.1105004

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