### Section Strength – Pillar Structures

By calculating the critical buckling stress for the section, we can better refine our choice of material parameters. Shown below is the equation to determine the critical buckling stress of a simple section. Please note that in this equation, geometry is the main factor with no influence of material strength.

First, the edge boundary conditions and the aspect ratio (a/b) of the compression surface(s) are needed to determine the buckling coefficient kc.

Shown here, the aspect ratio is simple to measure.