Abstract
According to thermoviscoelastic theory, the relations of laser-generated Rayleigh waves in viscoelastic plates with thermophysical and viscoelastic properties are investigated quantitatively. The displacement spectra are calculated in the frequency domain using the finite element method, and the temporal displacement waveforms are obtained by applying inverse fast Fourier transforms. And then, the effects of the laser parameters, including the laser spot radius, pulse rise time, and optical penetration depth, on the propagation of laser-generated Rayleigh waves are studied. In addition, the influence of the increase of each elastic modulus and viscous modulus of the viscoelastic plates on laser-generated Rayleigh waves is investigated in detail.
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