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| Nonlinear post-buckling of thin-walled box beams considering bending and torsion |
| Received:August 18, 2020 Revised:April 28, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20200818001 |
| KeyWord:bending torsion thin-walled box beam nonlinear post-buckling |
| Author | Institution |
| 谭敏尧 |
西南交通大学 机械工程学院, 成都 |
| 程文明 |
西南交通大学 机械工程学院, 成都 |
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| Abstract: |
| In this paper,the static stability of thin-walled box beams under eccentric loads is described by using a displacement field with medium bending-torsion under the premise of large displacement and small torsion.The nonlinear formula is applied to the pre-buckling and post-buckling behavior of simply supported box beams under different loads.Galerkin method is used to discretise the nonlinear differential system.The incremental Newton-Raphson method is used to solve the algebraic equation.The numerical results show that when the current buckling displacement is not negligible,the classical lateral buckling prediction is conservative and the nonlinear buckling solution is more reliable.In this paper,the effect of load height parameters on the analysis results is considered,and the calculated post-buckling response is compared with the finite element result (ANSYS) using shell elements. |