CUED Publications database

Effect of inclusions and holes on the stiffness and strength of honeycombs

Chen, C and Lu, TJ and Fleck, NA (2001) Effect of inclusions and holes on the stiffness and strength of honeycombs. International Journal of Mechanical Sciences, 43. pp. 487-504. ISSN 0020-7403

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Abstract

A finite element study has been performed on the effects of holes and rigid inclusions on the elastic modulus and yield strength of regular honeycombs under biaxial loading. The focus is on honeycombs that have already been weakened by a small degree of geometrical imperfection, such as a random distribution of fractured cell walls, as these imperfect honeycombs resemble commercially available metallic foams. Hashin-Shtrikman lower and upper bounds and self-consistent estimates of elastic moduli are derived to provide reference solutions to the finite element calculations. It is found that the strength of an imperfect honeycomb is relatively insensitive to the presence of holes and inclusions, consistent with recent experimental observations on commercial aluminum alloy foams.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:44
Last Modified: 08 Dec 2014 02:34
DOI: 10.1016/S0020-7403(99)00122-8