引張り荷重を受ける異種被着体段付き重ね合わせ接着継手の三次元有限要素応力解析と強度推定

概要

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Stress distributions in stepped-lap adhesive joints of dissimilar adherends subjected to tensile loadings are analyzed using a three-dimensional finite-element method (FEM). For establishing an optimum design method of the joints, the effects of some factors are examined. As the results, it is found that the maximum value of the maximum principal stress σ_1 occurs at the butted edge of the adherend's interfaces with higher Young's modulus. The maximum value of σ_1 decreases as the adherends Young's modulus ratio between two adherends and the adhesive thickness decreases. In addition, the joint strength is estimated using the interface stress distributions. For verification of the FEM calculations, experiments were carried out to measure the strains at the interfaces and the joint strengths. Fairly good agreements were found between the numerical and the experimental results. The joint strength of dissimilar adherends was found to be smaller than that of similar adherends.
社団法人日本機械学会の論文
2009-03-25