Fatigue Strength of Butt Welded Joint Made of SM50 Steel Plates for Welded Structures

A Consideration Based on Fatigue Behavior of Notched Specimens

Abstract

This paper is concerned with the effect of the reinforcement on the fatigue strength of butt welded joints. Since the fatigue strength of butt welded joint is strongly influenced by the geometrical conditions of reinforcement, it has been pointed out that the flank angle and the root radius of weld toe are responsible for the fatigue strength. However, the fatigue limit of butt welded joint of SM50 steel plates is nearly independent of the root radius of weld toe.
This result is explained from the characteristics of fatigue behavior of notched specimens made of the same materials.