Stability of biaxially loaded square plates with single central holes

Abstract

The stability of a biaxially loaded perforated square plate has been studied using the finite element method. The parameters considered in the study are the plate's slenderness ratio, diameter of the circular hole, the material's yield stress, and the ratio of biaxial loads. The study shows that the bigger the hole diameter, the less the plate strength and stability. Specific plate slenderness ratios, at which the plate buckling changes from elastic to elasto-plastic, are identified. Families of curves suitable for design purposes are also generated to define both of the elastic and elasto-plastic buckling stresses for the different plate hole sizes as functions of the plate's slenderness ratio, loading ratio, and yield stress.

Elastic local buckling of perforated webs of steel cellular beam–column elements

“…Paik [13] studied the ultimate strength characteristics of perforated steel plates under combined biaxial compression and edge shear loads. Recently, El-Sawy and Martini [14] studied the inelastic buckling behaviour of biaxially-loaded perforated square plate panel with single central hole.…”

An analytical solution of distortional buckling resistance of cold-formed steel channel-section beams with web openings

“…Early researchers focussed on the buckling and post-buckling response of perforated plates [3][4][5][6][7][8][9][10][11][12].…”

Proposed formulas for evaluation of the equivalent material properties of a multiholed structure

“…However, only one opening on a plate was considered for analysis of the compressive strength of perforation. The stability of a biaxial loaded square plate with a single central hole was numerically studied (El-Sawy and Martini, 2010), and the families of the design curve were generated to define the buckling stress for the various hole sizes, but the necessary experimental validation was not presented.…”