Abstract The effect of silica nano-particles on the three-point bending fatigue characteristics of plain weave carbon fiber composites (CFRP) was analyzed in the VHCF regime. The addition of silica had a significant effect on the fatigue life of CFRP, which extended the life by multiples. Rigid nano-particles enhanced the connection strength between polymer and carbon fiber, and had a passivating and even blocking effect on the growth of fatigue cracks. The fatigue damage morphologies of nano-particles modified CFRP were closely related to the stress magnitude. The stiffness degradation changed with the evolution of damage morphologies, showing a staged change characteristics.

中文翻译：

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纳米二氧化硅增强CFRP的超高三点弯曲疲劳性能

摘要 分析了二氧化硅纳米颗粒对平纹碳纤维复合材料（CFRP）三点弯曲疲劳特性的影响。二氧化硅的加入对CFRP的疲劳寿命有显着影响，使寿命成倍延长。刚性纳米粒子增强了聚合物与碳纤维之间的连接强度，对疲劳裂纹的生长具有钝化甚至阻断作用。纳米颗粒改性CFRP的疲劳损伤形貌与应力大小密切相关。刚度退化随损伤形态的演变而变化，呈现阶段性变化特征。