The structural hot-spot stress approach is an effective method for assessing welding details when nominal stress is hard to determine due to geometric or loading complexities. Hot spots can be classified into two types: type “a,” which refers to a weld toe located on a plate surface, and type “b,” denoting one located on a plate edge. Previous studies on type “b” hot spots have mainly focused on in-plane gusset welded joints, and the applicability of type “b” hot-spot S-N curves proposed for in-plane gusset joints in IIW to the other details is not well understood. In this study, fatigue tests were conducted with a load-carrying attachment welded on a plate surface, where a crack occurred from a weld toe on the plate edge. The tests were also numerically simulated using finite element analysis. Upon evaluating the test results through the nominal stress, structural hot-spot stress (4, 8, and 12 mm method), and notch stress approaches, it was found that all the data lie above FAT71 for nominal stress, FAT100 for hot-spot stress, and FAT225 for effective notch stress.

当由于几何或载荷复杂性而难以确定标称应力时，结构热点应力方法是评估焊接细节的有效方法。热点可分为两种类型：“a”型是指位于板材表面的焊趾；“b”型是指位于板材边缘的焊趾。以往对“b”型热点的研究主要集中在面内角板焊接接头上，IIW中针对面内角板接头提出的“b”型热点SN曲线对其他细节的适用性尚不清楚。在这项研究中，疲劳测试是通过焊接在板表面上的承载附件进行的，其中板边缘的焊趾处出现了裂纹。还使用有限元分析对测试进行了数值模拟。通过标称应力、结构热点应力（4、8、12mm法）和缺口应力方法对测试结果进行评估，发现所有数据均高于标称应力FAT71、热点FAT100应力，FAT225 有效缺口应力。