The purpose of this study is to improve interlaminar shear strength and self-healing efficiency of spread carbon fiber (SCF)/epoxy (EP) laminates containing microcapsules. Microencapsulated healing agents were embedded within the laminates to impart a self-healing functionality. Self-healing was demonstrated on short beam shear specimens, and the healing efficiency was evaluated by strain energies of virgin and healed specimens. The effects of microcapsule concentration and diameter on apparent interlaminar shear strength and healing efficiency were discussed. Moreover, damaged areas after short beam shear tests were examined by an optical microscope to investigate the relation between the microstructure and the healing efficiency of the laminates. The results showed that the stiffness and the apparent interlaminar shear strength of the laminates increased as the microcapsule concentration and diameter decreased. However, the healing efficiency decreased with decreasing the microcapsule concentration and diameter.

中文翻译：

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微结构优化，以提高含有微胶囊的碳纤维/环氧树脂层压板的层间剪切强度和自愈效率

本研究的目的是提高含有微胶囊的铺展碳纤维 (SCF)/环氧树脂 (EP) 层压板的层间剪切强度和自愈效率。微囊化修复剂嵌入层压板中以赋予自修复功能。在短梁剪切试样上证明了自愈合，并且通过原始和愈合试样的应变能评估了愈合效率。讨论了微胶囊浓度和直径对表观层间剪切强度和愈合效率的影响。此外，通过光学显微镜检查短光束剪切试验后的损坏区域，以研究微观结构与层压板愈合效率之间的关系。结果表明，随着微胶囊浓度和直径的减小，层压板的刚度和表观层间剪切强度增加。然而，愈合效率随着微胶囊浓度和直径的降低而降低。