Adaptive meshless analysis on thermo-elasto-plastic contact of rough surface

In order to simulate the contact condition factually, keep computational accuracy and improve computational efficiency, an adaptive meshless analysis on thermo-elasto-plastic contact problems of rough surface was implemented. Considering the temperature-dependent yield strength in computation, thermo-elasto-plastic contact model which combined a strain-energy gradient-based adaptive element-free Galerkin method and linear programming technique with the initial stiffness method was constructed and a correlative program flowchart was given. Thermo-elasto-plastic contact of rough surfaces was analyzed to validate the adaptive meshless method. The examples which considered the frictional force, strain-hardening property and temperature-dependent yield strength of the materials were discussed for two different steels, respectively. The results show that the accuracy of the solutions by the adaptive refinement model is satisfactory and the cost of the CPU time is only 10% of that of the uniform refinement calculation.