This work presents the results of an experimental study performed in carbon/epoxy composite materials manufactured using a ply-level hybridization technique. The aim of the study is to investigate the potential of such hybridization technique to promote pseudo-ductile failure, and to enhance fracture toughness. Two thin-ply carbon-epoxy systems and three different carbon-carbon hybrid lay-ups are considered. Both strength and fracture tests are performed on the manufactured laminates and the properties of the hybrid materials are compared to those of the baseline non-hybrid composites. Digital Image Correlation and post-mortem X-ray imaging are used to analyze the fracture process of the different materials. The comparison of the mechanical response of the different materials demonstrates that, by means of thin ply hybridization, a pseudo-ductile failure in tension can be obtained, associated with fibre fragmentation. However, the hybridization seems not to be responsible for the increased fracture toughness that is ascribable to the ply-thickness effect.

这项工作展示了在使用层级杂交技术制造的碳/环氧树脂复合材料中进行的实验研究的结果。该研究的目的是研究这种混合技术在促进假塑性破坏和提高断裂韧性方面的潜力。考虑了两种薄层碳-环氧树脂系统和三种不同的碳-碳混合叠层。对制造的层压板进行强度和断裂测试，并将混合材料的性能与基准非混合复合材料的性能进行比较。数字图像相关和验尸 X 射线成像用于分析不同材料的断裂过程。不同材料机械响应的比较表明，通过薄层杂化，可以获得与纤维断裂相关的拉伸假韧性破坏。然而，杂化似乎不是由于层厚效应导致的断裂韧性增加的原因。