The one-dimensional ideal elastic-plastic fluid hydrodynamical model with finite difference method is used to study the processes of formation and decay of the shock waves induced by laser irradiation to solid targets and effects of dynamic fracture.

By means of a hydrodynamic model in which electrons and ions have different temperature and same isothermal expanding velocity,it deals with interaction process of the intense pulse laser with the target,and gives scaling relationships between the plasma parameters and the laser or the target behaviour,in which include equilibrium absorption and radiation in the plasma.

A numerical method and an analytical method for study creation and decay of laser generated shock-wave in the target are presented on the basis of one-dimensional hydrodynamic model.The ablation presure is used as boundary condition.These methods permit the caculation of the three stages of shock-wave evolution.Three kinds of solid state material,such as Al,Cu and C/Ph are caculated.The maximum presure and shock-wave profile of each material are given out.