Parametric formulae for stress concentration factor and clamping-induced stress of butt-welded joints under fatigue test condition
Parametric formulae for stress concentration factor and clamping-induced stress of butt-welded joints under fatigue test condition
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DOI：
10.1007/s40194-022-01322-4
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发表时间：
2022-06-03
影响因子：
2.1
通讯作者：
Dai, Kaoshan
中科院分区：
文献类型：
--
作者：
Luo, Yuxiao;Tsutsumi, Seiichiro;Dai, Kaoshan
采用有限元法对对接焊接接头在疲劳试验条件下的应力集中系数和夹紧诱导应力进行了参数研究。在较宽的应用范围内，研究了角向和轴向不对中对自应力函数和夹紧诱导应力的影响。考虑了大量的参数，提出了相应的参数公式，并证明了公式的准确性。作为这些参数公式的应用，对接焊接接头的疲劳试验数据已收集和重新分析的有效缺口应力方法。结果表明，MN推荐的FAT 225（m = 3）缺口S-N曲线对对接焊接接头稍不保守。推荐使用FAT 200（m = 3）线路，以提高可靠性。对于不同板厚（t（s）= 3 - 40 mm）和材料屈服强度（f（y）= 247.4 - 1100 MPa）的疲劳数据，在缺口S-N图中没有发现显著差异。
Parametric study for the stress concentration factor (SCF) and clamping-induced stress of butt-welded joints under fatigue test condition has been carried out with the finite element method. The effect of angular and axial misalignments on the SCF and clamping-induced stress are investigated in wide application ranges. Corresponding parametric formulae are proposed with considerable parameters taken into account, which have been proved to be accurate. As an application of these parametric formulae, fatigue test data of butt-welded joints has been collected and re-analyzed with the effective notch stress approach. The results reveal that the FAT225 (m = 3) notch S-N curve recommended by MN is slightly non-conservative for butt-welded joints. FAT200 (m = 3) line is recommended by this paper for higher reliability. For the fatigue data with different plate thickness (t(s) = 3 - 40mm) and material yield strength (f(y) = 247.4 - 1100MPa), no significant difference is found in the notch S-N diagram.