Numerical Simulation on Failure of Internally Pressured Cylinder Shell Under Laser irradiation

摘要

The engine shell of the guide missile subjects to high-density internally pressure at normal active state. If it bears high-density laser irradiation, the temperature of the laser spot and adjacent materials will rise, localized thermal soft. The shell localized large deformation results in entirely bursting during thermal and mechanical acting. It is important academic and engineering worth to research failure of internally pressured cylinder shell under laser irradiation. To research the failure phenomenon, the thermal-mechanical coupling FEM is used in the paper. Heat conduction analysis coupled with strain rate is applied and factors such as the physical properties of material changing with the temperature are considered. The FEM results describe the whole phenomena, including thermal soften, large deformation and bursting of cylinder shell. And the time of shell failure with different internally pressure are obtained. The numerical results tally with those of Ref.