Wave propagation due to laser irradiation in viscoelastic thin metal film with fractional relaxation operator

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Abstract:

In the present paper, the model of generalized thermo-viscoelastic theory with fractional relaxation operators is used to capture the microscale responses of viscoelastic metal film irradiated uniformly by a laser pulse heat flux with non-Gaussian form. Employing Laplace transform as a tool, the problem has been solved analytically in the transformed domain. The inverse transforms are obtained by using a numerical method based on Fourier expansion techniques. The effects of fractional relaxation operators and viscoelastic property on the responses of the metal film are discussed and illustrated graphically.