It is well-known that fatigue failures in VHCF originate from defects present within the risk-volume. Moreover, experimental results have shown that the larger the specimen size and the risk-volume, the shorter is the VHCF life. This is known as size-effect and is generally due to the statistical increment of the defect size with the material volume.

In the paper, size-effect in VHCF is critically revised. The experimental results obtained by testing specimens with different sizes are analyzed and the methodologies proposed to model size-effect are discussed, with the aim of guiding the future research on size-effect in VHCF.

中文翻译：

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超高周疲劳的尺寸效应：综述

众所周知，VHCF 中的疲劳失效源于风险量中存在的缺陷。此外，实验结果表明，样本尺寸和风险量越大，VHCF 寿命越短。这被称为尺寸效应，通常是由于缺陷尺寸随材料体积的统计增量。

在这篇论文中，VHCF 中的尺寸效应被严格修改。分析了通过测试不同尺寸的样本获得的实验结果，并讨论了建议的尺寸效应建模方法，旨在指导 VHCF 中尺寸效应的未来研究。