Schafer  has developed semi-analytical finite strip method for elastic buckling
of cold-formed steel sections.
9] has used this spectrum to analyze plastic collapse load, ultimate strength, shear buckling strength and elastic buckling
strength of corroded plates with irregular surfaces.
11], presented an analytical procedure for the elastic buckling
problems of thin-walled members with variable-thickness cross sections.
In the classical theory of elastic buckling
, the coupling terms of translational displacements and axial rotation are ignored in the regime of small deformation [1-3].
It revealed that the using CFRP to slender sections increases axial capacity, strength-to-weight ratio, and elastic buckling
stress up to 4 times.
i) load corresponding to the elastic buckling
stage (ii) load resisted by tension field action and (iii) load contributed by the flanges.
The shape of the cells and their elastic buckling
and plastic micro mechanisms affect the mechanical behavior of the foam and impose hurdles on the exact determination of mechanical properties.
The design appendix in ASTM F1216 is based upon a classical elastic buckling
theory for an 'infinitely long tube' (L Greater than 4.
In addition to evaluating buckling stress by Southwell's method as just described, we also predicted it using Euler's elastic buckling
equation and Engesser's tangent modulus equation (Timoshenko and Gere 1963).
The elastic buckling
loads obtained from the above mentioned models are listed in Table 1.
e] is minimum global elastic buckling
load determined by:
The topics presented in the text pertain to various aspects of elastic buckling
and inelastic instability, with a detailed analysis of columns, beams, beam- columns, and frames.