正方形孔を有する極厚補剛材支持の正方形板の弾塑性せん断座屈強度(開学10周年記念号)

概要

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Elastic-plastic shear buckling of square plates with square holes is investigated experimentally. The plates are supported by extremely thick stiffeners, and subjected to in-plane shearing deformations through the stiffeners. Ratios of the square hole length to the plate length, 1/1, are 0.3, 0.5 and 0.7. For elastic stresses, finite element analysis shows good agreement with the experimental stresses at the hole edges and along the edges supported by the stiffeners. In this study, experimental buckling strength oi perforated plates with the ratios a/1 = 0.3, 0.5 and 0.7 is 0.78, 0.49 and 0.23 times of the unperforated plates respectively. For all the plates including the previous work, the elastic-plastic buckling strength increases with increasing the thickness of the stiffeners because of restiction of rotations and in-plane shearing deofrmations at supported edges.