中文摘要：

基于电子一声子相互作用的双曲两步热传导模型的超快热弹性理论，计及晶格的热传导效应，利用有限元方法研究了无限大金属薄膜在短暂激光冲击下诱导的位移、应力、应变和温度等物理量的演化特点，与已有文献比较，说明该方法的合理性与正确性．比较了计及电子热爆发力与不计电子热爆发力对位移、应力等物理量的影响，说明计及电子热爆发力的必要性．研究有利于对微型金属器件受到强热冲击产生破坏和失效的更深层次的理解，具有一定的学术意义和工程应用价值．

英文摘要：

An ultrafast thermoelasticity based on hyperbolic two-step heat conduction model with electron-phonon interaction is used to investigate thermomechanical response （including temperatures, stresses and displacements） of an infinite metal film impacted under femtosecond laser pulses by using finite element method （FEM）. The heat conduction effect of lattice is taken into account. Finite element governing equations are established and solved in time domain directly. The results, including electron and lattice temperatures, stresses and displacements, are presented graphically and compared with literatures. The results show that FEM method can be used to solve this kind of problem. The influences of hot-electron blast on displacements and stresses are discussed in detail and the results show that the hot-electron blast should be considered in the analysis.