Ultrasonic NDE of Layered Composites Using Pulsed Laser

Bresse, L. F.; Hutchins, D.A.; Hauser, Frances E.; Farahbakhsh, B.

doi:10.1007/978-1-4613-0817-1_66

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…The basic concept for evaluating the bond quality has been proposed by many researchers. Bresse et al [2] attempt to measure the delamination in an Al/epoxy layered panel by analysis of the resonance. This method is promising for such a special composite whose acoustic properties are well known, but possesses a difficulty for monitoring the diffusion bonded layer in which the acoustic properties are unknown.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of laser ultrasonics for detecting subsurface lateral defects

Guan

Shen

et al. 2005

SPIE Proceedings

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Non-contact and nondestructive monitoring of subsurface defects are urgently required especially in the line production of such products. In this paper a two-dimensional plane stress finite element model with absorbing boundary condition has been developed to investigate the ultrasonic wave generated by nanosecond pulsed laser propagation in two-layer material. The pulsed laser is assumed to be transient heat source, and the Surface acoustic wave is computed based on the thermoelastic theory, which propagated on the top surface of the plate. The defects located on the interface can be modeled as the subsurface slits of the Al/Cu layers. The numerical results include the three cases which the subsurface slit located in different positions of the interface of the Al/Cu layers. After performing Wigner-Ville analysis on the displacement data, frequency domain feature analysis is done. This study of the SAW was demonstrated to be promising in evaluating the bond quality as well as identifying the location of subsurface lateral defects.

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Section: Introductionmentioning

confidence: 99%