The Effects of Weld Geometry on the Fatigue Behavior of Welded Connections.

摘要

The studies were concerned with the effects of external geometry on the fatigue behavior of transverse butt welded joints in structural steels. Included were studies of the effects of weld profile,the stress concentrations produced by the weld geometry,and metallurgical aspects of the welds. The weld profile was measured in terms of the radius at the toe of the weld,the flank angle,the width of the weld,and the height of the weld. For the ASTM A36and A441steels studied,the height of the crown of the weld and the general angle at the toe of the weld appeared to provide the best geometrical correlation with fatigue life --the shorter lives were obtained from specimens with the highest reinforcement and the largest angle. Thus,the stress concentration produced by the radius at the toe of the weld (determined theoretically and by photo-elastic measurement) does not,as had been expected,necessarily define the fatigue behavior of a butt welded joint. (Author)