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Laser induced shock waves for composites adhesive bond testing

From National Research Council Canada

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Affiliation
  1. National Research Council Canada. NRC Industrial Materials Institute
  2. National Research Council Canada. NRC Institute for Aerospace Research
FormatText, Article
ConferenceProgress in Quantitative Nondestructive Evaluation 29, July 26-31, 2009, Rhode Island, USA
Abstract
A method based on shock waves produced by a pulsed laser is applied to the evaluation of bond strength of composite plates joined by an adhesive layer. A laser shock wave can cause a delamination when it propagates through the adhesive/plate interface. Different laser pulse energies can be used to evaluate this adhesion strength. A good bond will be unaffected by a certain level of shock wave stress whereas a weaker one will be damaged. The method is made quantitative and in-situ by optically measuring the sample surface velocity with an interferometer. The signals give a signature of well-bonded and disbonded interfaces, and are used to obtain an estimate of the bond strength. Results show that the proposed test is able to differentiate bond quality. Also, laserultrasonic measurements made on shocked samples confirmed that weak bonds are revealed by the laser shock wave method.
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  • Progress in Quantitative Nondestructive Evaluation 29 [Proceedings].
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 51418
NPARC number13621837
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Record identifier255a0dab-cf63-4d61-8401-12ad64f5d6b9
Record created2009-12-03
Record modified2020-08-12
Date modified: