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Buckling and postbuckling of anisotropic laminated cylindrical shells under combined axial compression and torsion |
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| Authors: | Hui-Shen Shen Y. Xiang |
| Affiliation: | aSchool of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200030, PR China bState Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200030, PR China cSchool of Engineering, University of Western Sydney, Locked Bag 1797, Penrith South DC, NSW 1797, Australia |
| Abstract: | A postbuckling analysis is presented for an anisotropic laminated cylindrical shell of finite length subjected to combined loading of axial compression and torsion. The governing equations are based on classical shell theory with von Kármán–Donnell-type of kinematic nonlinearity and including the extension–twist, extension–flexural and flexural–twist couplings. The nonlinear prebuckling deformations and initial geometric imperfections of the shell are both taken into account. A singular perturbation technique is employed to determine interactive buckling loads and postbuckling equilibrium paths. The numerical illustrations concern the postbuckling response of perfect and imperfect, anisotropic laminated cylindrical shells for different values of load-proportional parameters. The results show that the postbuckling characteristics depend significantly upon the load-proportional parameter. The results reveal that in combined loading cases the postbuckling equilibrium path is unstable and the shell structure is imperfection-sensitive. |
| Keywords: | Anisotropic laminated cylindrical shell Buckling Postbuckling Combined axial and torsion loading |
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