Abstract
The elastic flexural-torsional instability of monosymmetric I-beams and cantilevers is investigated using a general energy approach based on the vanishing of the second variation of the total potential energy. For simply supported beams, closed form solutions are presented which are valid for a wide range of section properties and which include the influence of pre-buckling displacements. Where the closed form solutions become inaccurate, and for cantilevers, numerical results are presented.
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