補強円孔を有する正方形板の弾性せん断座屈強度

概要

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Elastic shear buckling of square plates containing reinforced circular holes is investigated analytically. The perforated plates are subjected to uniform shear stress or uniform shear deformation, and are simply supported or clamped on all four edges. Ratios of the hole diameter to the plate width,d/l, are 0.15, 0.3, 0.5, 0.7 and 0.85. The influence of the circular hole and loading condition on buckling strength is considered. Relationships are presented between the buckling strength of plates, the size of the hole and depth of the reinforcing ring. In addition the results of an experimental study on square plates with circular holes which are reinforced to equal buckling strength of the unperforated plate are presented. The ratio of the width to the thickness of the test plates is 333. The plates are subjected to uniform shear deformations and clamped at all four edges. Results are compared with analysis and experiments for various sized holes. Comparison of analytical results with test shows good agreement on the elastic buckling strength for unperforated plate and the plate of d/l =0.3, and fairly good agreement for the plates of d/l =0.5 and 0.7. It is shown that the experimental ultimate loads of the perforated plates with reinforcements are from 5.6 to 7.0 times of the initial buckling loads.
福山大学の論文