Thin-walled steel cylinders surrounded by an elastic medium, when subjected to uniform external pressure may buckle. In the present paper, using a two-dimensional model with nonlinear finite elements, which accounts for both geometric and material nonlinearities, the structural response of those cylinders is investigated, toward developing relevant design guidelines. Special emphasis is given on the response of the confined cylinders in terms of initial imperfections; those are considered in the form of initial out-of-roundness of the cylinder and as an initial gap between the cylinder and the medium. Furthermore, the effects of the deformability of the surrounding medium are examined. The results indicate significant imperfection sensitivity and a strong dependency on the medium stiffness. The numerical results are employed to develop a simple and efficient design methodology, which is compatible with the recent general provisions of European design recommendations for shell buckling and could be used for design purposes.
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e-mail: davasili@mie.uth.gr
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February 2011
Research Papers
Buckling Design of Confined Steel Cylinders Under External Pressure
Daniel Vasilikis,
Daniel Vasilikis
Department of Mechanical Engineering,
e-mail: davasili@mie.uth.gr
University of Thessaly
, Volos 38334, Greece
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Spyros A. Karamanos
Spyros A. Karamanos
Department of Mechanical Engineering,
e-mail: skara@mie.uth.gr
University of Thessaly
, Volos 38334, Greece
Search for other works by this author on:
Daniel Vasilikis
Department of Mechanical Engineering,
University of Thessaly
, Volos 38334, Greecee-mail: davasili@mie.uth.gr
Spyros A. Karamanos
Department of Mechanical Engineering,
University of Thessaly
, Volos 38334, Greecee-mail: skara@mie.uth.gr
J. Pressure Vessel Technol. Feb 2011, 133(1): 011205 (9 pages)
Published Online: December 23, 2010
Article history
Received:
June 9, 2010
Revised:
August 26, 2010
Online:
December 23, 2010
Published:
December 23, 2010
Citation
Vasilikis, D., and Karamanos, S. A. (December 23, 2010). "Buckling Design of Confined Steel Cylinders Under External Pressure." ASME. J. Pressure Vessel Technol. February 2011; 133(1): 011205. https://doi.org/10.1115/1.4002540
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