Post-buckling Behaviors of Flat Plates under Axial Compression 2nd. Rep. Compression of Secondary Buckling Values Obtained by F.E.M. with Experimental Results
In the first paper, the secondary buckling phenomenon of simply supported elate was elucidated by an analytical method. In this second paper, that of clamped plate is analysed by the finite element method. The stability criterion in the nonlinear post-buckling equilibrium state is judged by the sign of determinant of stiffness matrix. It should be noted that the secondary buckling values of clamped elates are unexpectedly smaller than those of simply supported plates and are only one and a half times the first buckling values. In the previous analyses, only a quarter of plate has been treated by considering the equilibrium state with symmetrical mode to be stable. However, the instability can be verified by taking into account the unsymmetrical mode over the whole plate. Experiments on clamped square plates under uniaxial compression are carried out to verify the secondary instability and the experimental results are shown to agree with the numerical results.
軸圧縮をうける平板の座屈後の挙動 第2報, F.E.M.による座屈値と実験値との比較
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