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Journal of Applied Mechanics and Technical Physics

2018 year, number 1

Torsional Post-Buckling of a Simply Supported Thin-Walled Open-Section Beam Resting on a Two-Parameter Foundation

Ch. K. Rao1, L. B. Rao2
1Nalla Narsimha Reddy Engineering College, Chowdariguda, 500088, India
2School of Mechanical and Building Sciences, Chennai, 600127, India
Keywords: балка, открытый профиль сечения, закритическое поведение, скручивание, основание Винклера - Пастернака, beam, open section, post-buckling, warping, Winkler-Pasternak foundation


The problem of the post-buckling response of a simply supported thin-walled beam subjected to an axial compressive load and supported by the Winkler-Pasternak foundation is studied in this paper. The strains are assumed to be small and elastic. The shear deformations and the in-plane cross-sectional deformations are assumed to be negligible. The post-buckling paths of the simply supported beam are determined for different values of the Winkler and Pasternak stiffness parameters. Bifurcation points are found.