Abstract Investigation on the fatigue life of hybrid composites is critical to extend their structural applications. However, there is a lack of research on fatigue performance of hybrid composites. In this study, the fatigue life of a flax-basalt woven-ply hybrid composite is investigated and compared with the behaviour of 100% flax and 100% basalt composites. After the optimisation of the epoxy resin curing cycle, tension–tension fatigue tests were performed on samples with two orientations, 0°/90° and ±45°. S-N curves with absolute values and with normalised values are discussed. Results showed that the hybridisation was able to produce a positive effect on the fatigue resistance of basalt laminates: a better normalised fatigue resistance was obtained for the hybrid composite in comparison with the 100% basalt one in both orientations. A two-parameter fatigue life model was then applied and showed its ability to predict the fatigue behaviour of the hybrid composite for the two orientations. An analysis of damage mechanisms by means of infrared thermography and scanning electron microscopy allowed observing the different types of damage occurring during fatigue loading in hybrid composites.

中文翻译：

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亚麻-玄武岩/环氧树脂杂化复合材料与非杂化复合材料的疲劳行为

摘要 研究混合复合材料的疲劳寿命是扩展其结构应用的关键。然而，目前还缺乏对混合复合材料疲劳性能的研究。在这项研究中，研究了亚麻-玄武岩编织层混合复合材料的疲劳寿命，并将其与 100% 亚麻和 100% 玄武岩复合材料的行为进行了比较。在优化环氧树脂固化周期后，对具有 0°/90° 和 ±45° 两种取向的样品进行拉伸疲劳试验。讨论了具有绝对值和归一化值的 SN 曲线。结果表明，杂化能够对玄武岩层压板的抗疲劳性产生积极影响：与 100% 玄武岩复合材料在两个方向上相比，混合复合材料获得了更好的归一化抗疲劳性。然后应用了一个双参数疲劳寿命模型，并展示了其预测混合复合材料在两个方向上的疲劳行为的能力。通过红外热成像和扫描电子显微镜对损伤机制进行分析，可以观察混合复合材料疲劳加载过程中发生的不同类型的损伤。