Data for: Characterisation and analysis of transverse crack-induced delamination in cross-ply composite laminates under fatigue loadings

The file contains the entire set of experimental data obtained in the work: Characterisation and analysis of transverse crack-induced delamination in cross-ply composite laminates under fatigue loadings. The meaning of the symbols is reported in the same paper. Abstract of the work: The delamination growth represents one of the main phenomena involved in the fatigue damage evolution in composite laminates. With the aim of characterising qualitatively and quantitatively this mechanism and its interaction with the other damage modes occurring during the fatigue life, an experimental campaign was carried out on glass/epoxy infused laminates. Two lay-ups were adopted, namely [02/904]s and [0/902]s. The damage evolution was characterised at the macro and micro-scales. The adopted macro-scale damage indicators were the laminate stiffness drop, the crack density and the delamination ratio, of which the evolution along with the fatigue cycles is shown. Damage evolution and final failure were seen to be sensitive to scale effect. Micro-scale edge observations were useful to understand the interaction between transverse cracks, delamination and fibre failure, all these mechanisms concurring in the laminate final failure.

本文件包含该项研究的全部实验数据：《疲劳载荷（fatigue loadings）下正交铺层复合层合板（composite laminates）横向裂纹诱导分层的表征与分析》。文中所用符号的含义详见该研究论文。本研究摘要如下：分层扩展是复合层合板疲劳损伤演化过程中的核心现象之一。为实现该损伤机制的定性与定量表征，并厘清其与疲劳寿命周期内其他损伤模式的交互作用，研究团队针对玻璃纤维/环氧树脂灌注型层合板（glass/epoxy infused laminates）开展了系统试验研究。本研究采用两种铺层构型，分别为[02/904]s与[0/902]s。研究分别从宏观与微观两个尺度对损伤演化过程进行了表征。宏观尺度所用的损伤表征指标包括层合板刚度衰减、裂纹密度与分层率，文中给出了三者随疲劳循环次数的演化规律。研究表明，损伤演化与最终失效均表现出显著的尺度效应。微观边缘观测结果有助于阐释横向裂纹、分层与纤维断裂之间的交互作用，上述各类损伤机制共同导致了层合板的最终失效。