CFRP/金属接合はりの界面破壊靭性評価

抄録

Recently, replacing conventional metal components with CFRP has been promoted in automotive industry to realize weight saving. CFRTP whose matrix resin is thermoplastic has advantage of productivity comparison with conventional CFRP. Therefore, it is expected that CFRTP applies to production vehicles. However, it is necessary to develop lightweight and efficient methods of jointing dissimilar materials like CFRP and metal. Heat welding is one of the solution. So, we manufactured CFRTP/Metal composite beam by using heat welding and conducted DCB test and single lap shear strength test. Fracture toughness of interface calculated by BEM analysis and shear strength of interface showed differences of adhesive properties in press temperature. And we examined jointing mechanism by observing cross section of jointing part and fracture surfaces.