Abstract：Based on the dual phase lag heat conduction model (DPL model), the asymptotic analysis of the transient heat conduction behavior of a thin metal sheet irradiated by ultra-short pulse laser was conducted . The governing equation with temperature representation of a thin metal plate was proposed in the context of the DPL model. The asymptotic solutions of temperature distribution through the whole thin plate induced by external ultra-short pulse laser were derived by combing the Laplace transform and the inverse transform techniques. The results were compared with those from the numerical methods in the literature to verify the accuracy of the analytical method. The effects of the phase-lag terms τq,τT and the sheet metal thickness on heat transfer behavior were also investigated. The results show that the peak value of heat wave and the change rate of temperature are increased with the increasing of τq. On the contrary, as the τT increases, the peak value of heat wave and the temperature change rate are decreased. The metal plate thickness has slight effect on the temperature change.
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2020, Vol. 41 
