In this paper, a cohesive zone model is used to study the influence of inertial effects on crack growth considering cyclic loading in homogenous rate‐independent materials. Quasi‐static and dynamic solutions are compared in order to establish the conditions in which the inertial effects become important in the analysis. It is discussed how speed and frequency of the loading and specimen sizes modify crack growth characteristics. In general, an increase in the loading frequency leads to a higher propagation velocity. Very high loading frequencies may lead to the formation of microcracks ahead of the crack tip and may change the failure mode of the cracked structure from crack propagation to uniform debonding. This work shows that inertial effects are specially noticeable for frequencies in the kHz range. However, applied frequencies close to natural frequencies of the cracked specimen can give rise to strong inertial effects and then a substantial reduction of fatigue life for much lower frequencies. This work also shows that critical frequencies depend on the specimen size.

中文翻译：

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惯性对疲劳裂纹扩展的影响

在本文中，使用粘性区域模型来研究惯性效应对考虑均质速率无关材料中循环载荷的裂纹扩展的影响。比较准静态和动态解，以建立条件，在这些条件下惯性效应在分析中变得很重要。讨论了加载的速度和频率以及试样尺寸如何改变裂纹扩展特征。通常，加载频率的增加导致更高的传播速度。很高的加载频率可能会导致在裂纹尖端之前形成微裂纹，并且可能会使裂纹结构的破坏模式从裂纹扩展变为均匀脱胶。这项工作表明，惯性效应对于kHz范围内的频率特别明显。然而，接近破裂样品的固有频率的外加频率会引起强烈的惯性效应，进而大大降低较低频率下的疲劳寿命。这项工作还表明，临界频率取决于样品的大小。