CUED Publications database

Impact of carbon fibre/epoxy corrugated cores

Kazemahvazi, S and Russell, BP and Zenkert, D (2012) Impact of carbon fibre/epoxy corrugated cores. Composite Structures, 94. pp. 3300-3308. ISSN 0263-8223

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Abstract

The dynamic compressive response of corrugated carbon-fibre reinforced epoxy sandwich cores has been investigated using a Kolsky-bar set-up. Compression at quasi-static rates up to v 0=200ms -1 have been tested on three different slenderness ratios of strut. High speed photography was used to capture the failure mechanisms and relate these to the measured axial compressive stress. Experiments show significant strength enhancement as the loading rate increases. Although material rate sensitivity accounts for some of this, it has been shown that the majority of the strength enhancement is due to inertial stabilisation of the core members. Inertial strength enhancement rises non-linearly with impact velocity. The largest gains are associated with a shift to buckle modes composed of 2-3 half sine waves. The loading rates tested within this study are similar to those that are expected when a sandwich core is compressed due to a blast event. © 2012 Elsevier Ltd.

Item Type: Article
Uncontrolled Keywords: Blast protection Corrugated cores Inertial stabilisation Sandwich structures
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:59
Last Modified: 08 Dec 2014 02:39
DOI: 10.1016/j.compstruct.2012.04.034