J111011 Effect of Size of Microstructures on Interfacial Fracture Toughness of Composite Adhesive Joint Treated by In-mold Surface Preparation

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  • J111011 インモールド表面処理を施した複合材接着継手の界面破壊靭性へ微細構造寸法が及ぼす影響([J11101]マイクロナノ理工学:nmからmmまでの表面制御とその応用(1))

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In order to improve interfacial properties of an adherend of the bonded composites joints, in-mold surface preparation using nanoimprint lithography is proposed. In the proposed method, microstructures are fabricated on the surface of the mold used during curing process of composites. By forming CFRP on the mold with microstructures, the shape of microstructures is transferred to the CFRP surface. In this method, since molding of CFRP and surface preparation can be conducted at once, it reduces the time required and costs involved in conventional surface preparation such as sand blasting, chemical etching etc. In this paper, micro concavo-convex structure was proposed to improve the mode I fracture toughness of CFRP/adhesive interface and fabricated on the surface of CFRP by in-mold surface preparation. According to DCB tests, it was confirmed that the fracture toughness become stronger as the aspect ratio A of microstructures increased.

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