CUED Publications database

The effect of hole size upon the strength of metallic and polymeric foams

Fleck, NA and Olurin, OB and Chen, C and Ashby, MF (2001) The effect of hole size upon the strength of metallic and polymeric foams. Journal of the Mechanics and Physics of Solids, 49. pp. 2015-2030. ISSN 0022-5096

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Abstract

Tensile and compressive tests have been performed on centre-hole panels, made from three types of metallic foams and two polymeric foams. In compression, the foams fail in a ductile, notch-insensitive manner, in support of a "net section strength" criterion. In tension, a ductile-brittle transition is observed for some of the foams at sufficiently large specimen sizes: for a small hole diameter the net section strength criterion is obeyed, whereas for a large hole a local stress criterion applies and the net section strength is reduced. For a number of the foams, the panel size was not sufficiently large to observe this ductile-brittle switch in behaviour. The predictions of a cohesive zone model are compared with the measured strengths and are found to be in good agreement. © 2001 Elsevier Science Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Cohesive zone model Foams Monotonic and fatigue properties Notch sensitivity Transition flaw size
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:40
Last Modified: 12 Dec 2014 19:04
DOI: 10.1016/S0022-5096(01)00033-3