紀要論文

異なる繊維長分布・成形方法のリサイクルCFRPにおける破断面観察による破壊モードの理解

FRACTURE MODE INVESTIGATION BY OBSERVING THE FRACTURE SURFACE OF RECYCLED CFRP WITH DIFFERENT FIBER LENGTH DISTRIBUTIONS AND MOLDING METHODS

jpn

24368083

https://doi.org/10.15002/00030630

法政大学大学院理工学研究科

法政大学大学院紀要. 理工学研究科編

65

1

7

2024-03-24

Version of Record

Carbon fiber reinforced plastic (CFRP) is generated in large quantities when aircraft structural materials are discarded. many methods have been proposed to separate CFRP resin and fiber, but how to reuse recycled carbon fiber has not yet been fully investigated. a JAXA study is investigating a method to produce dry non-woven fabric from recycled carbon fiber (rCF) and then formed into recycled CFRP (rCFRP) for reuse. However, there are two problems: the fiber length of the recycled carbon fiber is fixed at 80 mm, but in reality, short fibers are mixed in, and the wet lay-up method is time-consuming and labor intensive when forming rCFRP by impregnating the nonwoven fabric with resin. The objective of this study is to clarify the differences in rCFRP failure modes due to different fiber length distributions and molding methods. Tensile tests were performed on rCFRPs molded under different conditions (wet lay-up, press molding, prepreg molding) to investigate how the tensile fracture mode varies with different fiber lengths, thermoset or thermoplastic resins, and different molding methods. The results are discussed from the observation of fracture surface by optical microscopy and SEM.

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