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Generation of Thermoelastic Waves by Irradiating a Metal Slab with a Line-Focused Laser Pulse  

Yoo, Jae-Gwon (Laboratory for Quantum Optics, Korea Atomic Energy Research Institute)
Baik, S.H. (Laboratory for Quantum Optics, Korea Atomic Energy Research Institute)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.26, no.3, 2006 , pp. 181-189 More about this Journal
Abstract
A 2D finite-element numerical simulation has been developed to investigate the generation of ultrasonic waves in a homogeneous isotropic elastic slab under a line-focused laser irradiation. Discussing the physical processes involved in the thermoelastic phenomena, we describe a model for the pulsed laser generation of ultrasound in a metal slab. Addressing an analytic method, on the basis of an integral transform technique, for obtaining the solutions of the elastodynamic equation, we outline a finite element method for a numerical simulation of an ultrasonic wave propagation. We present the numerical results for the displacements and the stresses generated by a line-focused laser pulse on the surface of a stainless steel slab.
Keywords
Laser Ultrasonic; Thermoelastic Wave; Rayleigh Surface Wave; Elastodynamics; Finite Element Method;
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Times Cited By KSCI : 2  (Citation Analysis)
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