接合境界面近傍にき裂を有する異材接合体の変形挙動

概要

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The bonded dissimilar plates are often used for chemical apparatus and pressure vessels. The failures of those apparatus and vessels can lead to serious accidents. In the present paper, an explosion clad plate composed of copper and mild steel is dealt with as a typical example of the bonded dissimilar plate. Tensile tests are carried out by using rectangular plate specimens extracted from the clad plate. Each specimen has an artificial through-the-thickness edge crack close and perpendicular to the explosive interface. The effects of the material inhomogeneity, the residual stress and the hardened zone on the deformation near a crack are examined by the experiment and the finite element analysis. The lower-strength material ahead of a crack and the tensile residual stress near the bonded interface increase the crack opening displacement. The higher-strength material ahead of a crack, the compressive residual stress and the hardened zone near the bonded interface decrease the crack opening displacement.
一般社団法人日本機械学会の論文
1998-01-25