軸圧縮荷重を受ける円筒殻のクリープ座屈解析　　有限要素法による分岐座屈解析

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  • Creep buckling analysis of circular cylindrical shell under axial compression. (Bifurcation buckling analysis by the finite element method)
  • ジク アッシュク カジュウ オ ウケル ハン トウ カク ノ クリープ ザクツ

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説明

The finite element method is applied to creep buckling of a circular cylindrical shell under axial compression. In the finite element formulation, nonlinear strain-displacement relation is employed and creep strain is treated as an initial strain within a small time increment. Not only the axisymmetric mode but also the bifurcation mode of creep buckling are considered in the analysis. The critical time for creep buckling is defined as either the time when a slope of a displacement vs. time curve becomes infinite or the time when bifurcation buckling occurs. The creep buckling analyses are carried out for an infinitely long, axially compressed circular cylindrical shell. The numerical results are compared with available analytical ones and experimental data.

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