分层会改变复合材料结构的完整性并降低其刚度和长期力学性能，若能在分层萌生时就及时修复，必将提高结构服役的安全性。本项目以碳纤维/环氧复合材料(CFRPs)I/III型分层裂纹的自修复为研究对象，首先制备碳纳米管/共聚物(CNTN/CP)修复薄膜，研究其作为“离位界面”的力学性能和电热性能；其次，将CNTN/CP引入CFRPs作为“在线界面”并建立有限元分析模型，分析其性能和厚度对层间应力分布、分层萌生应力和极限强度的影响规律，将分析得出的性能较佳的CNTN/CP进行实验并探讨其对CFRPs中I/III型分层裂纹的修复率；最后，将性能较佳的CNTN/CP引入T型接头，采用数值分析和实验相结合的方法，探讨拉伸载荷下CNTN/CP对其I型分层萌生应力-剥离应力-分层损伤修复率的最优关系。通过实验和理论研究，发展一种全新的自修复CFRPs，显著提升其使用寿命、充分发挥其减重效益和减轻环境影响。

Delamination would change the integrity of composite structures and reduce its stiffness and long-term mechanical properties. If self-healing can be performed once delamination initiates, it would undoubtedly improve the safety of the structure in service. This project aims to self-heal the mode I/III delamination cracks in carbon fiber/epoxy composites (CFRPs). Firstly, carbon nanotube/copolymer (CNTN/CP) healing films were prepared, and its mechanical and electro-thermal properties acted as "off-line interface" were studied. Secondly, CNTN/CP was introduced into laminates and acted as "on-line interface", and a finite element analysis model was established to analyze the effect of its properties and thickness on the interlaminar stress distribution, delamination initiation and the ultimate strength. And the proper CNTN/CP was chosen to prepare laminates and evaluate it's self-healing effect. Finally, the optimized CNTN/CP healing interface was introduced into a T-joint structure, and the optimal relationship of the healing interface on the delamination initiation stress, peeling stress, and corresponding delamination healing rate of the studied structures was discussed through numerical analysis and experimental verification. Based on the experimental and theoretical studies, a new self-healable CFRP is developed, which would show a significantly improved service life, giving full play to their weight reduction benefits and reducing negative effect to the environment.