1113 GFRP/ステンレス二重重ね合せ接着継手のはく離進展挙動  [in Japanese] Delamination Propagation Behavior of GFRP/Stainless-Steel Double Lap Adhesive Joints  [in Japanese]

The fracture behavior of GFRP/Stainless-steel double lap adhesive joints was studied analytically and experimentally. Firstly, the stress distributions near the delamination edge were analyzed by FEM. It was found that the normal stress near the delamination edge is compressive until the delamination length reaches 10mm. However, after the delamination length reaches 10mm, the normal stress near the delamination edge becomes tensile. Secondly, to investigate the delamination propagation behavior, tensile shear tests on double lap joints were performed. It was found that the delamination initiates at the bonding edge of the stainless-steel and the GFRP, and then it propagates along the adhesive interface. However, the delamination turns into the GFRP layer when normal stress becomes tensile. It is therefore concluded that the normal stress dominates the fracture behavior of GFRP/stainless-steel adhesive joints.