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首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Stress concentration factors of DK square-to-square tubular joints
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Stress concentration factors of DK square-to-square tubular joints

机译：DK方形至方形管状接头的应力集中系数

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摘要

The fatigue life of tubular joints with many braces, e.g., DK and DTK joints, are commonly determined by treating them as tubular joints with less braces, e.g., T/Y, K, and X joints, based on the joint classification approach recommended by the American Petroleum Institute. The DK square-to-square tubular joint type was selected to verify the reliability and accuracy of such an approach. A parametric stress analysis of DK square-to-square tubular joints subjected to axial loads, in-plane and out-of-plane bending moments has been performed using the finite element technique. The results of this analysis are presented as a set of formulas expressing the stress concentration factor as a function of the relevant geometric parameters for various loading conditions. A comparison is made between the results obtained for DK square-to-square tubular joints and those obtained for X and K square-to-square tubular joints, which are commonly employed to simulate the former when the joint classification approach is adopted. In general, the stress concentration factors for DK joints are significantly higher, which shows that the recommended approach may not be reliable and accurate in dealing with DK joints.
机译：通常，根据以下建议的接头分类方法，将具有许多支撑的管状接头的疲劳寿命（例如DK和DTK接头）视为具有较少支撑的管状接头（例如T / Y，K和X接头）来确定。美国石油学会。选择DK方对方管状接头类型以验证这种方法的可靠性和准确性。已经使用有限元技术对承受轴向载荷，平面内和平面外弯矩的DK方对方管状接头进行了参数应力分析。分析结果以一组公式表示，这些公式将应力集中系数表示为各种载荷条件下相关几何参数的函数。将DK方形至方形管状接头的结果与X和K方形至方形管状接头的结果进行比较，当采用关节分类方法时，通常将其用于模拟前者。通常，DK接头的应力集中系数要高得多，这表明推荐的方法可能不适用于DK接头。

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