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Failure Behavior of Cellular‐Core Ceramic Sandwich Composites
Author(s) -
Voorhees Eric J.,
Green David J.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06838.x
Subject(s) - materials science , flexural strength , composite material , weibull distribution , core (optical fiber) , ceramic , weibull modulus , composite number , sandwich structured composite , relative density , fracture (geology) , stress (linguistics) , microstructure , linguistics , statistics , mathematics , philosophy
The mechanical behavior of a novel ceramic sandwich composite system was investigated. This system was comprised of a low‐density, cellular alumina core bonded to dense alumina faceplates. The flexural strength and elastic properties of the core material alone were measured as a function of relative density. For the sandwich system, failure mechanisms and failure loads for a variety of core densities and face thicknesses were recorded. Initial failure mechanisms were observed to be exclusively core fracture but in a non‐catastrophic manner. In order to successfully predict these failure loads with existing theory, Weibull statistics were incorporated into the analysis. This allowed flexural strengths measured independently on the core material to be scaled to those expected from the stress distribution in the sandwich core.