鋼管交差溶接継手の疲労強度 : 溶接まま継手における残留応力の影響

概要

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The purpose of this paper is to make clear the weld residual stress at toe of tubular T-and/or X-joint. The influence of the residual stress on fatigue strength is also dealt with. It is pointted out that the residual stress perpendicular to the weld line at the toe of tubular T-joint is very similar to that of fillet welded tee joint. After a brief description about the combined effect of mean stress and weld residual stress on the fatigue strength of fillet welded plate joints, the influence of the residual stress on the fatigue strength of as welded tubular joints (T and X) is studied, using fatigue test results which have been already published. The results are presented as the relations between stress range and residual stress, for seven referenced numbers of cycles to failure. Based on the results, the influence of chord thickness on the fatigue strength of turbular joints is discussed.
社団法人日本船舶海洋工学会の論文