Abstract
In order to improve interfacial properties of bonded composites joints, in-mold surface preparation using nanoimprint lithography is proposed. In this method, CFRP is formed on the mold with microstructures and the shape of microstructures is transferred to the CFRP surface, which gives us adherent surface without any conventional surface treatment. In this paper, microstructures which improve mode I fracture toughness of adhesive joints were proposed and fabricated on CFRP laminates. It was confirmed experimentally that fracture toughness become stronger as the aspect ratio of microstructures increased.
