Notice of RetractionEffect of preformed angle on stress distributed in weld-bonded aluminum single lap joints

The influence of the preformed angle in the lap zone of the adherend on the stress distribution in weld-bonded aluminum single lap joint was investigated using elastic-plastic finite element method (FEM). The results obtained show that the preformed angle plays a significant pole on the stress distributions either along the mid-bondline or near the interface of the adhesive/adherend in the joint so that the stress distribution of overlap zone was more even and the various stresses peak value reduced obviously, which may elevate the load bearing capacity of the joint. The peak stresses of nearly all the stress components as well as the equivalent stress at the end of the lap zone transferred gradually to the middle part of the lap zone and the nugget as the preformed angle increased so that the stress distribution in the middle part of overlap zone was improved. The various peak values of all the stresses in the adherend near the interface decreased significantly but the stresses within the nugget nearly kept the same or increased slightly as the preformed angle increased.