Finite element simulation of friction stir welding temperature field and residual stress field of 7075 aluminum alloy

Based on the characteristics of the friction stir welding and Coulomb friction work theory, 7075-T7315 aluminum alloy flats with thickness of 6 mm were chosen as the study objects. Based on ANSYS code, a three dimensional numerical model with two heat flux inputs of friction stir welding were established. Moreover, the effect of welding speed and rotation speed on temperature and residual stress distributions were investigated.