Abstract A comprehensive review is conducted on the very high cycle (VHC) and gigacycle (GC) fatigue of fiber-reinforced composite materials. The main objective was to conduct a benchmarking survey of high-frequency fatigue test methods that have been introduced by different research groups for testing beyond 107 loading cycles. Therefore, test methods are classified into two major groups, i.e. axial and bending tests. Axial fatigue tests were performed whether by conventional servo-hydraulic or by ultrasonic testing machines. For bending tests, three approaches have been taken into account. Firstly, conducting cantilever bending fatigue tests using a shaker-based actuator. Secondly, testing by an ultrasonically actuated three-point bending test set-up, and finally, using an electro-dynamically actuated four-point bending test device. The measures that are taken to mitigate challenges of testing at high-frequencies are put forward. The effect of loading frequency and temperature rise on fatigue behavior is investigated. VHC fatigue damage mechanisms are scrutinized for different composite materials, layup configurations, and testing approaches. Considering the importance of modeling in the design stage, the models that have been developed so far for predicting fatigue behavior of composite materials in the VHC and GC fatigue regimes, are presented. Finally, by performing a gap analysis, new perspectives required to be investigated more deeply are nominated.

中文翻译：

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纤维增强复合材料的超高周疲劳和千兆周疲劳：实验方法和疲劳损伤机制综述

摘要 对纤维增强复合材料的甚高周（VHC）和千兆周（GC）疲劳进行了全面综述。主要目标是对不同研究小组引入的用于超过 107 个加载循环的测试的高频疲劳测试方法进行基准调查。因此，测试方法分为两大类，即轴向和弯曲测试。轴向疲劳试验是通过传统的伺服液压或超声波试验机进行的。对于弯曲试验，考虑了三种方法。首先，使用基于振动台的执行器进行悬臂弯曲疲劳测试。其次，通过超声波驱动的三点弯曲测试装置进行测试，最后，使用电动驱动的四点弯曲测试装置进行测试。提出了缓解高频测试挑战的措施。研究了加载频率和温升对疲劳行为的影响。VHC 疲劳损伤机制针对不同的复合材料、叠层配置和测试方法进行了仔细检查。考虑到建模在设计阶段的重要性，介绍了迄今为止已开发的用于预测复合材料在 VHC 和 GC 疲劳状态下的疲劳行为的模型。最后，通过执行差距分析，提名需要更深入研究的新观点。VHC 疲劳损伤机制针对不同的复合材料、叠层配置和测试方法进行了仔细检查。考虑到建模在设计阶段的重要性，介绍了迄今为止已开发的用于预测复合材料在 VHC 和 GC 疲劳状态下的疲劳行为的模型。最后，通过执行差距分析，提名需要更深入研究的新观点。VHC 疲劳损伤机制针对不同的复合材料、叠层配置和测试方法进行了仔细检查。考虑到建模在设计阶段的重要性，介绍了迄今为止已开发的用于预测复合材料在 VHC 和 GC 疲劳状态下的疲劳行为的模型。最后，通过执行差距分析，提名需要更深入研究的新观点。