Bonding quality detection of composite structure by laser shock wave

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DOIResolve DOI: http://doi.org/10.3788/CJL201138.0308032
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TypeArticle
Journal titleZhongguo Jiguang/Chinese Journal of Lasers
ISSN0258-7025
Volume38
Issue3
Article number308002
SubjectAdhesive bonding; Adhesive layers; Bond quality; Bond strength; Bonding quality; Carbon fiber reinforced polymer; CFRP plates; CFRP structures; Laser shock wave; Laser shock waves; Mechanical performance; Non-destructive evaluation methods; Non-destructive evaluation techniques; On-line evaluation; Sample surface; Wave stress; Weak bond; Carbon fibers; Fiber reinforced plastics; Polymers; Pulsed lasers; Reinforced plastics; Shock waves; Structure (composition); Ultrasonic applications; Waves; Quality control
AbstractThe 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.
Publication date
LanguageChinese
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute (IMI-IMI)
Peer reviewedYes
NPARC number21271449
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Record identifier73659d47-4750-4350-b30e-6eca1673adb1
Record created2014-03-24
Record modified2016-05-09
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