To date the term “Fatigue Damage” has had an ambiguous usage in the fatigue community. This paper explains the reason for the poor predictive results of existing fatigue damage rules, such as Miner’s rule, through precise observation of small crack growth during multiple step loadings. For the exact evaluation of fatigue damage it is crucially important to attend to the phenomenon of the continuous decrease in the fatigue limit with crack growth until final failure. It is stress amplitudes above the fatigue limit for a given crack size that contribute to fatigue damage.

中文翻译：

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多步幅载荷疲劳损伤概念的现实：现有损伤计数模型结果不成功的原因

迄今为止，“疲劳损伤”一词在疲劳社区中的用法不明确。本文通过 对多步加载过程中小裂纹扩展的精确观察，解释了现有疲劳损伤规则（如 Miner 规则）预测结果不佳的原因。对于疲劳损伤的准确评估，关注疲劳极限随裂纹扩展直至最终失效的持续下降现象至关重要。 对于给定的裂纹尺寸，高于疲劳极限的应力幅值会导致疲劳损坏。