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Steel and Composite Structures
  Volume 5, Number 1, February 2005, pages 001-15

Buckling of sandwich cylindrical shells under axial loading
Mitao Ohga, Aruna Sanjeewa Wijenayaka and James G. A. Croll

    Important characteristics of the previously proposed reduced stiffness method and a summery of its design curves for the buckling of the axially loaded sandwich cylindrical shells is presented. Comparison of the lower bound obtained with FEM analysis with that from the reduced stiffness analysis shows that the proposed reduced stiffness method can provide safe lower bounds for the buckling of geometrically imperfect, axially loaded sandwich cylindrical shells. One of the attractive features of the reduced stiffness elastic lower bound analysis is that it provides safe estimates of buckling loads that do not depend on the specification of the precise magnitude of the imperfection spectra. As a result, designers can readily apply this method without being worried about possible geometrical imperfections that might be generated during fabrication and construction of sandwich cylindrical shells.
Key Words
    sandwich shells; reduced stiffness; buckling; lower bound; axial loading.
Mitao Ohga and Aruna Sanjeewa WijenayakarnDepartment of Civil and Environmental Engineering, Ehime University, 3, Bunkyo-Cho, Matsuyama 790-8577, JapanrnrnJames G. A. CrollrnDepartment of Civil and Environmental Engineering, University Collage of London, London WC1E 6BT, U.K.

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