2-3 クラックアレスターの有効性について(第1報)(昭和42年学協会刊行物掲載論文再録集)

概要

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The crack arrester is used for prevention of welded steel structures from brittle fracture. In the latest mammoth tankers, the welded crack arrester of high quality steel such as grade E steel is used instead of the riveted seam. In this paper, the brittle crack arresting characteristics for welded crack arrester was investigated by using large size specimens in 1,300mm width. Then the correlation between the characteristics in large size specimen and in standard ESSO test with temperature gradient as a substitute of double tension test was examined. From the test results, it was found that the modified gross stress-arresting temperature curves for arrested crack length of 500, 750 and 1,000mm, respectively, were common, and the effective crack length was approximately 250mm which was obtained from the ESSO test or the double tension test with temperature gradient. In addition, the effect of width of arrester plate on the crack arrest in which the distribution of residual stress was taken into account, was found.
独立行政法人海上技術安全研究所の論文
1968-03-30