부산대학교 도서관

Based on Abaqus software, a finite-element model was established to simulate the friction stir lap welding of aluminum and titanium dissimilar metal. Then the influence of rotational velocity for the lap interface and transient temperature field were simulated. The simulation results show that increasing the rotation speed can increase the friction thermal production between the rotational tool and material in unit time. The difference of the thermal input generated by friction between the rotating shoulder and the welded plate results in a bowl-like shape. Compared with the Al/Ti lap, the Ti/Al lap can guarantee enough thermal input and obtain good weldment quality under the reasonable welding parameters.