Auto-adapting heat source model for numerical analysis of friction stir welding

The heat generation mechanism and dependency of material properties on temperature can' t be fully characterized by the heat source models used now.According to friction mechanics, a heat generation model based on yield strength was established.The model can make auto-adaptation to material property and temperature variation and represent the physical nature during FSW process. Comparison between experiment of thermal field and simulation results indicates that the accuracy is quite good for this new heat model.