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首页> 外文期刊>International journal of steel structures >Prediction of Stress Intensity Magnification Factors of a Weld Toe Crack in Load-Carrying Cruciform Fillet Welded Joints Under Axial Loading
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Prediction of Stress Intensity Magnification Factors of a Weld Toe Crack in Load-Carrying Cruciform Fillet Welded Joints Under Axial Loading

机译：轴向载荷下承载十字形角焊缝焊接趾裂纹裂纹的应力强度放大因子预测

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摘要

Load-carrying cruciform fillet welded joint is commonly encountered in on-shore and offshore structures. In this study, the stress intensity magnification factors (M-km) of such configuration containing a 3-D semi-elliptical surface crack at the weld toe are analysed using 3-D finite element analyses. Due to the non-penetrating fillet welds at the intersection of the main plate and transverse stiffener, the M-km values are found to be much larger than the corresponding results of non-load-carrying cruciform welded joints. Therefore, a new set M-km equations for load-carrying joints are built up using multiple regression analyses, and statistical analyses are carried out to validate the goodness of fit of these equations. It is noted that the existing British Standard 7910 (BS 7910) assessment equation produces an over-conservative prediction on M-km values as compared with the newly proposed M-km equations, and the largest over-estimation percentage difference is as high as 257.8%.
机译：在陆上和海上结构中通常会遇到承载十字形角焊缝。在这项研究中，使用3-D有限元分析来分析这种在焊趾处包含3-D半椭圆形表面裂纹的构造的应力强度放大系数（M-km）。由于在主板和横向加劲肋的相交处进行了非渗透角焊，因此，M-km值比无载荷十字形焊接接头的相应结果大得多。因此，使用多元回归分析建立了一套新的承载关节的M-km方程，并进行了统计分析以验证这些方程的拟合优度。值得注意的是，与新提出的M-km方程相比，现有的英国标准7910（BS 7910）评估方程对M-km值产生了过度保守的预测，最大的高估百分比差高达257.8 ％。

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