The fracture mechanics-based IBESS approach is applied to the determination of FAT classes of butt welds with crack initiation along the weld toe. The aim is an investigation of the effect of the geometrical parameters toe radius, flank angle, reinforcement and secondary notches such as roughness or undercuts. The influence of these parameters is discussed both individually and in combination; however, excluding statistical distributions of them and the material data. The results, when compared with conventional FAT classes for butt welds, are encouraging with respect to a potential contribution of IBESS to the discussion of more advanced quality criteria for welds. To that purpose, demands for further research are proposed.

中文翻译：

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通过基于断裂力学的模拟获得的焊趾几何参数对FAT类的影响

基于断裂力学的IBESS方法被用于确定沿焊趾出现裂纹的FAT对接焊缝类型。目的是研究几何参数的影响，包括趾部半径，后角，加强筋和次要缺口（例如粗糙度或底切）。这些参数的影响将单独讨论或组合讨论。但是，不包括它们和材料数据的统计分布。与常规FAT类对接焊缝相比，结果令人鼓舞，因为IBESS对讨论更高级的焊缝质量标准的潜在贡献。为此，提出了进一步研究的需求。