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A Journal of Russian Academy of Sciences
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IssuesArchive of Issues2025-2pp.825-838

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V.V. Chistyakov and S.M. Soloviev, "A New Method for Determining the Buckling Resistance in the Nonlinear Range of Strains for a Column Supported by Rotational Stiffeners," Mech. Solids. 60 (2), 825-838 (2025)
Year 2025 Volume 60 Number 2 Pages 825-838
DOI 10.1134/S0025654424603902
Title A New Method for Determining the Buckling Resistance in the Nonlinear Range of Strains for a Column Supported by Rotational Stiffeners
Author(s) V.V. Chistyakov (Ioffe Institute, St.-Petersburg, 194021 Russia, v.chistyakov@mail.ioffe.ru)
S.M. Soloviev (Ioffe Institute, St.-Petersburg, 194021 Russia, serge.soloviev@mail.ioffe.ru)
Abstract An innovational method for solving the Euler–Bernoulli problem of an overall buckling of the uniform column supported by rotational springs of stiffnesses γ1, γ2, N·m free from traditional simplifications (invariable flexural stiffness and length) is given. It is based on a natural and comprehensive constraint on the restored axis length. A system of algebraic equations relating the critical stress σcr to the nonlinear compression diagram ε(σ) of the material, the slenderness of the column λ and the values γ1, γ2 has been obtained, solved and verified in important special cases. It is shown that columns of the same material with the same so-called the reduced spring stiffnesses have identical dependencies σcr(λ). It is shown that columns with λ≤λmin1, γ2) cannot be buckled by any axial load F for various types of ε(σ) (Ramberg-Osgood, rational fraction, polynomial, etc.).
Keywords overall buckling, rotational spring, critical stress, restored length, reduced stiffness
Received 21 May 2024Revised 03 October 2024Accepted 03 October 2024
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