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A sandwich structure is comprised of layered composite materials formed by bonding two or more thin facings or facesheets to a relatively thick core material. This article describes the sandwich panel failure modes. It tabulates the nomenclature and definitions for loads, geometry, and material properties. The article illustrates critical strength-check locations for a flat sandwich panel. It discusses the analysis methods formulated for flat rectangular honeycomb panels; curved sandwich panel; and for each of the various sandwich panel failure modes. The article concludes with a discussion on flat panel stability analysis methods.

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Stephen Ward, Analysis of Sandwich Structures, Composites, Vol 21, ASM Handbook, Edited By Daniel B. Miracle, Steven L. Donaldson, ASM International, 2001, p 308–320,

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