Journal
OPTICS AND LASER TECHNOLOGY
Volume 73, Issue -, Pages 173-178Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2015.04.026
Keywords
Surface-breaking crack; Laser ultrasound; Rayleigh wave
Categories
Funding
- National Natural Science Foundation of China [U1430120]
- Aero-Science Fund of China [20120951015]
- International S&T Cooperation Program of China [2013DFR70780]
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Based on the finite element method (FEM), the surface-breaking cracks have been investigated by using the laser-generated Rayleigh wave. The features of laser-generated Rayleigh wave interaction with cracks are analyzed in time and frequency domain. The simulation results show that the surface acoustic wave induced by the pulsed laser is sensitive to the surface-breaking cracks. As the crack depth increases, the transmission coefficients almost linearly decrease and the reflection coefficients show a dip. The corresponding experimental results have verified the feasibility of numerical calculation and reached a good agreement with simulation results. The research findings would provide a potential application for testing surface-breaking cracks of aircraft parts. (C) 2015 Elsevier Ltd. All rights reserved.
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