Effetto delle dimensioni del cordone di saldatura sulla resistenza a fatica dei giunti a croce

The choice of the proper weld size for cruciform joints can be a critical topic especially in case of different thicknesses of the welded plates. According to technological recommendations the size of the weld bead should not exceed the thickness of the thinnest plate. On the other hand, design standards do not suppose the joint static and fatigue resistance to be dependent on the weld size provided that it is thick enough to avoid the failure of the weld itself instead of the failure of the welded plate. The aim of this work is to study, both from a theoretical and an experimental point of view, the effect of different weld sizes on the fatigue resistance of cruciform joints