Elastic Buckling of Imperfect Cylinders Containing Granular Solids
Publication: Journal of Structural Engineering
Volume 116, Issue 8
Abstract
Metal silos are subject to both internal pressure and axial compressive stresses in their cylindrical‐shell walls. Their design is often controlled by buckling. The buckling strength is greatly reduced by geometric imperfections in the wall, but increased by internal pressure. It is also increased by the stiffness of a granular bulk solid against the wall. This stiffness provides a restraint to the lower parts of funnel‐flow‐silo walls. This paper examines the elastic buckling strengths of imperfect cylindrical shells under axial compression, with imperfections in the form of a depression at a circumferential welded joint. The effects of internal pressure and elastic restraint from the static stored solid are examined. A procedure by which the characteristics of the granular solid may be incorporated into the buckling calculation is proposed. The restraint stiffness is taken to be dependent on the stress level in the stored solid, the mode of buckling, and the level of internal pressure. The results may be used in planning experiments to verify the theory, or in any assessment of the probable strength of an existing structure.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 116 • Issue 8 • August 1990
Pages: 2253 - 2271
Copyright
Copyright © 1990 ASCE.
History
Published online: Aug 1, 1990
Published in print: Aug 1990
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