Kusano, Yukihiro1; Sørensen, Bent F.1; Løgstrup Andersen, Tom1; Leipold, Frank3
1 Department of Wind Energy, Technical University of Denmark2 Composites and Materials Mechanics, Department of Wind Energy, Technical University of Denmark3 Department of Physics, Technical University of Denmark4 Plasma Physics and Fusion Energy, Department of Physics, Technical University of Denmark
A gliding arc is a plasma that can be operated at atmospheric pressure and applied for plasma surface treatment for adhesion improvement. In the present work, glass-fibre-reinforced polyester plates were treated using an atmospheric pressure gliding arc discharge with an air flow to improve adhesion with a vinylester adhesive. The treatment improved wettability and increased the polar component of the surface energy and the density of oxygen-containing polar functional groups at the surfaces. Double cantilever beam specimens were prepared for fracture mechanics characterisation (fracture resistance as a function of nominal mode mixity) of the laminate adhesive interface. It was found that gliding arc treatment significantly increases the interfacial fracture energy and fracture resistance in comparison with a standard peel ply treatment, although the mixed mode fracture energy of the gliding arc treated specimen was not as high as that of the laminate itself.