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Experimental and numerical investigation of the crushing response of an open section composite energy absorbing element

journal contribution
posted on 2011-01-01, 00:00 authored by Mathew JoostenMathew Joosten, S Dutton, D Kelly, R Thomson
The quasi-static crushing response of carbon epoxy composite hat-shaped crush elements is described herein. A steeple-type triggering mechanism was used to ensure the specimens exhibited a continuous stable crushing mode of failure. The explicit finite element software PAM-CRASH was used to predict the crushing failure of these energy absorbing elements. A four-layer, stacked-shell model of the composite hat-shaped element, after calibration against experimental test data, was found to be capable of closely approximating the failure modes and provide agreement with the load vs. displacement behaviour observed during the experiments. The predicted steady state load and specific energy absorption were respectively within 1.5 and 0.2% of the experimental average. With further validation, the developed stacked-shell methodology could help provide a predictive tool to characterise the energy absorption of open section crush elements and significantly reduce the cost associated with an extensive experimental material characterisation test program.

History

Journal

Composite structures

Volume

93

Pagination

682-689

Location

Amsterdam, The Netherlands

ISSN

0263-8223

Language

eng

Publication classification

C Journal article, C1.1 Refereed article in a scholarly journal

Copyright notice

2010, Elsevier

Issue

2

Publisher

Elsevier

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