軸力および曲げモーメントを受ける肉厚円筒の外圧による圧かい

概要

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Plastic instability phenomena of chick walled circular tube under external pressure, in addition to which axial force and bending moment are applied, are analysed numerically by a three dimensional finite element method. The affection of axial force and bending moment on the axisymmetric and non-symmetric bifurcation points, which are regarded as an onset on unstable inhomogeneous deformation, are examined in relation to the constitutive expressions of the material. The effect of deformation constraint at the ends on the collapsing process, that is, post-bifurcation behavior is discussed according to the results of numerical simulations. Finally it is pointed out that since application of bending moment produces oval deformation in a a cross section at the early deformation stage, it accelerates significantly the collapse of the tube.
一般社団法人日本機械学会の論文
1984-02-25