Abstract The numerical study of the inter-fibre failure at micromechanical level predicts the appearance of different stages in the development of this damage mechanism; these studies have also allowed the main features of each stage (such as the interfacial debond length and the kinking angle) to be identified. The development of experimental studies aiming to check the relevance of the aforementioned numerical results is crucial. Based on this, this research focused on the tensile test under different loading levels of specimens manufactured from carbon-epoxy cross-ply symmetrical laminates. The microscopic observation of the 90° layers leads to the analysis of the appearance of the transverse cracks as a function of the load, the identification of the previously numerically predicted stages of the mechanism of damage, the measurement of key parameters and the evaluation of the influence of nearby fibres. A clear connection between the numerical and experimental results has been found.

中文翻译：

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张力下纤维间断裂的显微观察

摘要 微观力学水平上纤维间失效的数值研究预测了这种损伤机制发展的不同阶段；这些研究还允许确定每个阶段的主要特征（例如界面脱粘长度和扭结角）。旨在检查上述数值结果的相关性的实验研究的发展至关重要。在此基础上，本研究侧重于由碳-环氧交叉层对称层压板制成的试样在不同载荷水平下的拉伸试验。对 90° 层的显微观察导致对横向裂纹外观的分析作为载荷的函数，识别先前数值预测的损伤机制阶段，关键参数的测量和附近光纤影响的评估。已经发现数值和实验结果之间存在明显的联系。