止端の疲れ破壊における溶接線の傾きの影響

概要

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From the standpoint of geometrical shapes, the relation between the fatigue strength at the toe of weld and the inclination of a weld line to the direction of principal stress was investigated. Two plates, which differed in thickness from each other, were butt-welded, and then specimens were cut out of them, changing the angle between the long axis of specimen and the weld line. In addition, the simulated specimens made of the same steel, which had a fillet with a flnak angle of 45 degrees were prepared. Plain bending fatigue tests were then carried out on these specimens. Test results show that the fatigue limit does not increase monotonously, as the weld line changes from transverse to longitudinal to the long axis of the specimen, as often described, but takes a minimum value in about the middle direction, and the type of fracture changes afterwards. To make clear these differences, careful check is made of fatigue strength values reported in the literatures concerned and then, such tendencies as mentioned above are studied.
社団法人溶接学会の論文
1967-11-25