CNT分散接着層を有するCFRP継手のモードI疲労き裂の進展と検知機能

抄録

Carbon fiber reinforced polymer (CFRP) composites have been extensively used in many aerospace structures. In recent years, the development of advanced composite materials such as highly-functional CFRP composite laminates has specifically attracted attention. In this study, we evaluated the Mode I fatigue behavior and crack monitoring of bonded CFRP composite joints with CNT-based polymer adhesive layer. The bonded joints were fabricated using woven carbon/epoxy composite substrates and CNT-based epoxy adhesives. Mode I fatigue tests were performed using double cantilever beam (DCB) bonded joint specimens, and it was evaluated the effect of the nanotube content on the critical energy release rate. The electrical resistance of the bonded joint specimens was monitored during the tests, and the electrical resistance was changed due to a crack propagation in the bonded joint specimens.