Local buckling of composite beams with edge-stiffened flanges subjected to axial load

Abstract

Local buckling analysis of thin walled composite beams is presented, where the flanges are stiffened at their free edges. The web and the flanges are modelled by rotationally restrained long orthotropic plates. Explicit expressions are developed for the calculation of the lowest buckling load. For the stability of the flange distortional buckling, plate buckling (or local buckling) and their interaction are considered, while the stabilizing effect of the web is taken into account by elastic constraint. Web buckling is modelled with a long plate, whose edges are constrained by stiffeners with warping stiffness. The accuracy of the method is demonstrated through numerical examples.

Local buckling of FRP thin-walled plates, shells and hollow sections with curved edges and arbitrary lamination

“…In this regard, the plate and shell methodologies presented in previous sections may be directly applied. Tarján et al [40] summarises the steps taken in undertaking discrete plate analysis for composite members with rectangular faces. The current paper extends these steps and the existing DPA methodology to consider face segments with non-rectangular faces.…”

Postbuckling behavior and failure prediction of large‐size composite C‐beam under bending‐shear coupling load

“…The load-bearing verification of beams typically involves cantilever beam bending, [13] axial compression, [13,22,28] and torsion. [29][30][31] Failure modes are mainly composed of local buckling, [32,33] global instability, [34] or postbuckling. [35][36][37][38] The buckling model [39,40] of composite laminates is established theoretically, which is beneficial to the structural design of beams.…”