The paper deals with the high‐cycle fatigue behaviour of steel butt‐welded joints in the as‐welded condition, under constant amplitude loading. It tackles the problem of strength assessment by changing the geometrical shape and features of the weldment. This investigation considers the recommendations available in design standards, particularly referring to the Eurocodes, and it re‐analyses experimental data where a clear profile of the actual weld shape is available. For the available weld profiles, numerical investigations are shown by applying the Implicit Gradient approach for the evaluation of the nonlocal effective stress in the fatigue strength assessment. The results are very promising since the nonlocal approach significantly agrees with design standard recommendations in conventional cases, but it is also able to provide specific indications on the influence of the geometrical features, as well as the tip radius and opening angles, specifying their influence when no explicitly detailed indications are available in the design standards.

中文翻译：

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非局部方法对钢对接焊缝疲劳强度的几何影响概述

本文讨论了在恒定振幅载荷下，钢对焊接头在焊接状态下的高周疲劳行为。它通过更改焊件的几何形状和特征来解决强度评估的问题。这项调查考虑了设计标准中可用的建议，尤其是参考了欧洲规范，并在可获得清晰的实际焊缝轮廓的情况下重新分析了实验数据。对于可用的焊接轮廓，通过应用隐式梯度方法来评估疲劳强度评估中的非局部有效应力，可以显示数值研究。由于非本地方法与传统情况下的设计标准建议非常吻合，因此结果非常有希望，