Instability in shear of simply supported square plates with reinforced hole

Abstract

The cri tical shear stresscs wer c dete rmined for five elastic, simply supporled sq ua rc plates with central circular holes of diam eter on e-eight and o ne-fourth the length of a s id e. Comparison of t he Jlum e ri cal res ul ts obtained with those computed for plates without holes sho\\'s t hat, although an unreinforccd hole may cause a large r eduction in t he cr itical shcar st ress of the p la te, rein fo rceme nt of the hole by a circu lar doubler plate causes a s ubstantial i ncrea se in the shear buck li ng load.