き裂線上の変位不連続性に基づく応力分布と応力拡大係数の評価法 : モードIおよびモードII成分を含むき裂の場合

概要

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In linear fracture mechanics, stress intensity factors controlling the fracture behavior of materials are calculated from stress distributions acting on the crack surfaces by the aid of superposition even for remote applied stresses. An equation was derived by which such stress distributions can be assessed from each mode-discontinous displacement along a crack with mode I and II components, based on the complex-valued formulas on the stress and displacement of a two-dimensional crack. The validity of the derived equation was theoretically checked by a closed-form solution of a slant crack under biaxial loading. For a slant crack 45 deg to the tensile loading axis in a rectangular specimen, the stress distributions and stress intensity factors K_I and K_II, which were evaluated from the discontinous displacements measured along a crack, were in good agreement with those values calculated from the applied stresses.
社団法人日本機械学会の論文
1991-04-25