Journal
COMPOSITE STRUCTURES
Volume 93, Issue 10, Pages 2646-2654Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2011.04.032
Keywords
Energy absorption; Crushing; Quasi-static loading; Dynamic loading; Interleaving
Categories
Funding
- CRC-ACS
- University of New South Wales
- Pacific ESI
- Defence Science and Technology Organisation
- Australian Aerospace
- Deutsches Zentrum fur Luft-und Raumfahrt (DLR)
- DLR Institute
- Australian Postgraduate Award
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The effect laminate design on the crush performance of carbon-fibre/epoxy DLR crush elements has been experimentally investigated. A quasi-isotropic lay-up was found to result in the highest Specific Energy Absorption (SEA) for Four-Harness (4HS) reinforced laminates; however a hybrid of unidirectional weave and 4HS fabric produced the highest SEA of 114 kJ/kg. Interleaving with thin thermoplastic films increased the steady state crushing force, however the increase in laminate density associated with the addition of the film caused no improvement and in some cases a reduction in SEA depending on material and lay-up. Dynamic crush testing of selected laminate designs resulted in a reduction in SEA of between 6% and 15% compared to the quasi-static case. (C) 2011 Elsevier Ltd. All rights reserved.
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