On the Stress Criterion for Fatigue Fracture of Welded Baems under Bending Load (Report 2)

Abstract

In the previous paper, experiments and considerations were carried out to determine the stress criterion for fatigue fracture of general welded beams having a extremely sharp incomplete penetration (notch). As the result, some stress criterion might be suggested.
In this paper, the stress criterion for fatigue fracture of welded beams having dull notch made artificially and then effect of dull notch is comparatively smaller than that of sharp notch were investigated experimentally.
The experiment has revealed the following ; namely, it was found that the fracture due to combined effect of flexural shear and normal stresses could be obtained in a beam having a dull notch as in the case of beam having a sharp notch, and moreover other stress criterion, though it was different from that of sharp notch, might be certified for dull one.