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A finite difference method for studying thermal deformation in a thin film exposed to ultrashort-pulsed lasers. (English) Zbl 1189.74034

Summary: Ultrashort-pulsed lasers have been attracting worldwide interest in science and engineering. Studying the thermal deformation induced by ultrashort-pulsed lasers is important for preventing thermal damage. This article presents a finite difference method for studying thermal deformation in a thin film exposed to ultrashort-pulsed lasers. The method is obtained based on the parabolic two-step model. It accounts for the coupling effect between lattice temperature and strain rate, as well as for the hot-electron-blast effect in momentum transfer. The method allows us to avoid non-physical oscillations in the solution as demonstrated by numerical examples.

MSC:

74F05 Thermal effects in solid mechanics
74K35 Thin films
74S20 Finite difference methods applied to problems in solid mechanics
80A20 Heat and mass transfer, heat flow (MSC2010)
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