Enhancement of the in-Plane Shear Properties of Carbon Fiber Composites Containing Carbon Nanotube Mats

다국어 초록 (Multilingual Abstract)

The in-plane shear property of carbon fiber laminates is one of the most important structural features ofaerospace and marine structures. Fiber-matrix debonding caused by in-plane shear loading is the major failuremode of carbon fiber composites because of the stress concentration at the interfaces. In this study, carbonnanotube mats (CNT mat) were incorporated in two different types of carbon fiber composites. For the case ofwoven fabric composites, mechanical interlocking between the CNTs and the carbon fibers increased resistanceto shear failure. However, not much improvement was observed for the prepreg composites as a result of incorporationof the CNT mats. The reinforcement mechanism of the CNT mat layer was investigated by a fractographicstudy using scanning electron microscopy. In addition, the CNT mat was functionalized by three differentmethods and the effectiveness of the functionalization methods was determined and the most appropriatefunctionalization method for the CNT mat was air oxidation.

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