Abstract The axial compressive strength of continuous fibres reinforced composite laminates is a key design parameter. The mechanism at stake is the micro-buckling instability of fibres, which is contained by the shear stiffness of their neighbourhood, and particularly that of the matrix. Adding nano-fillers to polymer matrices increase this property. Therefore, the compressive strength should in turn be enhanced. In this study, we exhibit some limits of this statement by studying two epoxy resins and two carbon fibres. We show that in some cases premature damage may occur close to the fibre/matrix interface. We provide qualitative and quantitative explanations supported by failure analyses and compressive strength estimations.

中文翻译：

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添加纳米填料以提高连续纤维/环氧树脂基复合材料的抗压强度的局限性

摘要 连续纤维增强复合材料层合板的轴向抗压强度是一个关键的设计参数。危险的机制是纤维的微屈曲不稳定性，这是由其附近的剪切刚度，特别是基体的剪切刚度所包含的。向聚合物基质中添加纳米填料会增加这种特性。因此，应依次提高抗压强度。在这项研究中，我们通过研究两种环氧树脂和两种碳纤维来展示这种说法的一些局限性。我们表明，在某些情况下，靠近光纤/基质界面可能会发生过早损坏。我们提供由失效分析和抗压强度估计支持的定性和定量解释。