応力特異性消失条件を用いた異種接合材料の形状の選択に関する基礎的検討

概要

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The present authors showed that the free-edge stress singularity in bonded dissimilar materials disappeared for certain combinations of wedge angles of the pair of materials. In the present study, the stress distributions on the interface of bonded dissimilar materials with smooth free-edges were calculated by the boundary element method, under the geometrical condition of the disappearance of free-edge stress singularity. The shape of interface or the shape of free-edges was changed systematically to find the shape minimizing the maximum normal stress or the maximum shear stress on the interface. The normal stress on the interface was concentrated at the center of the interface and near the intersection of the interface and free-edge. It was found that an optimum shape of the interface or the free-edges existed for which the maximum normal stress was minimized. The shear stress on the interface was concentrated at a point near the intersection of the interface and the free-edge. The maximum shear stress was decreased for small curvature of the interface or the free-edges near the intersection of the interface and free-edge. These findings can be used for shape design of bonded dissimilar materials.
社団法人日本機械学会の論文
1994-09-25