抄録
Fatigue tests of spot welded joints were carried out in order to evaluate the effect of the difference between two nugget sizes on fatigue strength. It appears from the obtained results that the smaller the difference between both nugget diameters or areas, the longer the fatigue life of the joints, because of the decreasing stress concentration within the joints. Consequently, it is clear that this difference is a very important factor in the development of the fatigue strength of multi-spot welded joints.
