衝撃引張り荷重を受ける異種材料スカーフ接着継手の有限要素応力応答解析

抄録

The stress behavior in adhesive scarf joints of dissimilar adherends subjected to tensile impact loads are analyzed in an elastic region using three-dimensional finite element method (FEM). FEM code employed is DYNA3D. An impact load is applied to a joint by dropping a weight. The end of the upper adherend is fixed and the other end of the lower adherend is subjected to an impact load. The effects of scarf angles and combination types of the adherends, the adhesive thickness and Young’s modulus of the adhesive on the stress behavior at the interfaces are examined. It is found that the maximum value of the maximum principal stress σ₁, appears at the interface between the adhesive layer and the lower adherend, and it is independent of the combination types of the adherends. In the cases of scarf angles of 52.47, 60 and 75 degrees among the seven cases, the maximum principal stress σ₁ and each stress distributions at the interfaces become to be more homogeneous. The value of the maximum principal stress σ₁ decreases as Young’ modulus of the adhesive decreases and the adhesive thickness increases. In addition, experiments are carried out to measure the strain response of the adhesive scarf joints subjected to impact tensile loads using strain gauges. A good agreement is seen between the tendencies of the analytical and experimental results.