Notch effect of welded joint

Abstract

In general, the welded joints are multifactorial notches. This study is focused to separate the geometrical influence (when the weld can be seen on the surface) and technological factors (internal defects of the weld, structural changes of the material and residual stress) on its fatigue life. Proposed methodology of this separation comes out from the cyclic test of three specimens - group with existing weld, group without weld joint (base material) and another group where was removed outer geometry of the weld.