Pressure profile of plasma is one of the most important factors for the effects of laser shock peening. In the present research, a one-dimensional coupling model for computing plasma pressure is established based on energy conservation condition in the system, in which the interface vaporization velocity and the nonlinear relationship between the shock pressure and the surface particle velocity are considered. Then, the explicit difference program and the LS-DYNA package are used to calculate the plasma pressure for different laser power density with given time-history profile. The simulation results show a good agreement with the experimental results, which indicates the consistency of the analytical model. Therefore, an effective method is provided to predict the plasma pressure induced by laser shock peening.
修改评论