Chinese Journal of Lasers, Volume. 38, Issue 3, 308002(2011)

Bonding Quality Detection of Composite Structure by Laser Shock Wave

Gu Zhuowei1,2、*, Mathieu Perton1, Silvio E.1, Martin Lord1, Alain Blouin1, and Jean-Pierre Monchalin1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    The carbon fiber reinforced polymer (CFRP) is more and more attractive because of its excellent mechanical performances, while the application of CFRP is limited because the non-destructive evaluation method is still not well done. A method based on shock waves produced by a pulsed laser is applied to the evaluation of bond quality of CFRP plates joined by an adhesive layer. A laser shock wave can cause a tension when it propagates through the adhesive/plate interface. A good bond will be unaffected by a certain level of shock wave stress whereas a weaker one will be damaged. In the experiments, the sample surface velocities are optically measured with an interferometer. The signals give a signature of well-bond or bad ones, and are used to obtain an estimate of the bond strength. Results show that the proposed test is able to differentiate bond quality. Laser-ultrasonic measurements made on shocked samples also confirm that weak bonds are revealed by the laser shock wave. The development of this technique will probably make the on line evaluation of CFRP structure possible in the future.

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    Gu Zhuowei, Mathieu Perton, Silvio E., Martin Lord, Alain Blouin, Jean-Pierre Monchalin. Bonding Quality Detection of Composite Structure by Laser Shock Wave[J]. Chinese Journal of Lasers, 2011, 38(3): 308002

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    Paper Information

    Category: measurement and metrology

    Received: May. 24, 2010

    Accepted: --

    Published Online: Mar. 1, 2011

    The Author Email: Zhuowei Gu (guzhw@yahoo.com.cn)

    DOI:10.3788/cjl201138.0308002

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