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RESEARCH PAPERS

Dynamic Plastic Buckling of Sandwich Shells

[+] Author and Article Information
Henry Vaughan, H. E. Lindberg

Explosives Engineering Department, Poulter Laboratory for High Pressure Research, Stanford Research Institute, Menlo Park, Calif.

J. Appl. Mech 35(3), 539-546 (Sep 01, 1968) (8 pages) doi:10.1115/1.3601248 History: Received December 15, 1967; Online September 14, 2011

Abstract

The formation of small, flexural wrinkles in the walls of a sandwich shell under uniform radial impulse is examined. A buckling criterion based on the magnifications of initial wall imperfections is used to evaluate threshold impulses. Using a given weight of material, this criterion is used to determine the optimum ratios of the inner and outer wall thicknesses for various core thicknesses. It is shown that the optimum shell for a given weight of material and outer diameter is a single-wall shell. The loss in efficiency obtained by using typical sandwich shells is about 30 percent. These results are supported by experimental evidence.

Copyright © 1968 by ASME
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