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18 November 2014 Finite element simulation of laser-induced guided wave in layered structure
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Ultrasonic field in layered structure excited by a nanosecond pulsed laser irradiation is numerically simulated by finite element method. Typical calculation is executed for a configuration of a zirconium nitride (ZrN) thin film with different thickness on a steel substrate. The waveforms of surface acoustic wave are presented and the dispersion properties of surface waves in two-layered structure are analyzed by the method of phase spectral analysis, and the results show that the surface wave is anomalous dispersive with the higher frequencies propagating fast than the lower frequencies, and that with the decrease of film thickness, the dispersion of surface wave becomes more serious.
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Yan Zhao and Liping Xue "Finite element simulation of laser-induced guided wave in layered structure", Proc. SPIE 9266, High-Power Lasers and Applications VII, 926614 (18 November 2014);

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