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Computer Simulation of Laser-Generated Ultrasonic Wave by Finite Element Method

We have developed computer programs which are able to clarify the mechanical generating process and propagative process of thermoelastic ultrasonic waves in a solid using pulsed lasers. This paper presents numerical results for elastic wave stresses versus parameters of the laser pulse exciting them. A comparison of the longitudinal waveform is given by analytical solution and finite element solution in a one dimensional problem, and the properties of wave propagation are described for longitudinal and transverse waves in a two dimensional problem.