Application of Young's buckling equation to design against torsional buckling

Abstract

Young’s equation, which was published in 1807, provides the basis for the Perry equation for the design of struts against flexural buckling. Current design for torsional flexural buckling assumes that the critical torsional flexural stress can be substituted for the Euler stress in the Perry equation. This takes no account of the actual stress distribution around the for flexural buckling. The Paper proposes section, which differs greatly from that an application of Young’s equation to the torsional flexural components of displacement, and a realistic stress distribution can then be found. Comparisons are given with the current design method. The calculation is readily performed with the help of a spread sheet. Alternatively, a possible simple design equation is suggested, based on the analysis in the Paper.