On the Bending Fatigue Strength of Fillet Weld Joints of Stiffened Plate

Abstract

The bending fatigue tests of fillet weld joints of stiffened plate due to flexural vibration were carried out with T-type joint specimens of mild steel (SM41B) of 12 mm and 22 mm thick under constant amplitude loading conditions corresponding to two vibration modes in which the maximum dynamical stress works to the weld toe of the stiffened panel sides and to web side joint.
The weld toe and root fatigue strengths were evaluated by the local stress at weld toe and by the direct stress at root, respectively. The fatigue property of fillet weld joints with zero root penetration was appreciated by the initial threshold stress intensity factor range.