構造要素の衝突圧壊強度に関する基礎的研究(その6) : 軸荷重を受ける円筒鋼管の軸対称逐次座屈現象の有限要素解析

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This paper concerns with the axisymmetric progressive buckling analysis of circular cylinders under axial compression using the nonlinear finite element method. The presently developed finite element program is an extended version of the original code^<1)>, which takes into account the major factors in the quasi-static crushing problems such as large displacements, large strains, contact, friction and localization of buckling patterns. For the frictional contact of boundary nodes on the cylinder, Coulomb's law is adopted with constraints of the nodal displacements^<4)>. The contact between the surfaces of the cylinder is treated by the finite gap elements^<9)> The numerical results have agreed well with the results of experiments, which were conducted by the authors^<1)> with respect to the crushing deformation, axial load-shortening relations, mean crushing stresses, crushing strokes and plastic buckling stresses. It is concluded that the complicated progressive buckling behavior accompanied with the strong non-linearity was successfully simulated by the present numerical procedure.
社団法人日本船舶海洋工学会の論文