接触与大变形问题的光滑有限元分析OA北大核心CSTPCD

Rubber material is widely used in practical engineering due to its good seismic and energy absorption effect.However,the collision of hyperelastic materials is a strong nonlinear problem.It is of great significance to analyze the contact collision and large deformation of hyperelastic materials to improve the buffering per-formance of the device.The smoothed finite element method(S-FEM)is a weak form of numerical calculation method.Compared with the traditional finite element method,the smoothed finite element method has low re-quirements on the mesh quality,allows the element to undergo large deformation during the calculation process,where the construction of the smooth domain is more flexible.The S-FEM has high accuracy without additional degrees of freedom.Based on the S-FEM,the double potential method was applied to contact calcu-lation,with both advantages of the S-FEM in calculating large deformation problems and advantages of the double potential method in solving contact force fully used.In comparison with the numerical results of finite el-ement software MSC.Marc,the results of the proposed algorithm were verified with high accuracy and good energy conservation,and the effects of the friction coefficient on the collision body were analyzed.