ブラストおよび大気圧プラズマ照射がSPCC接着接合継手の静的および疲労強度に及ぼす影響

抄録

For greater fuel efficiency and increased safety, shifts to design of car body using multi-material such as ultra-high strength steel, aluminum alloy and carbon-fiber-reinforced plastic (CFRP) in addition to conventional steel are accelerated. Therefore, effective joint methods for dissimilar materials are required. Adhesive bonding has attracted attention from this point of view. The strength of adhesive bonding joints is affected by the surface conditions of the adherend. Therefore, in this study, the effects of abrasive blasting and atmospheric plasma treatment on the static and fatigue strength of SPCC (steel plate cold commercial) adhesive joint were evaluated. It was found that abrasive blasting increased the surface roughness and waviness due to the collision of particles and improved both static and fatigue strengths of the joints due to anchor effect. On the other hand, atmospheric plasma treatment created hydrophilic surface of SPCC, however, only fatigue lives of the joints increased and the static strength was not improved.