Energy absorption in aluminium honeycomb cores reinforced with carbon fibre reinforced plastic tubes

Article


Alantali, A., Alia, R. A., Umer, R. and Cantwell, W. J.. 2019. "Energy absorption in aluminium honeycomb cores reinforced with carbon fibre reinforced plastic tubes." Journal of Sandwich Structures and Materials. 21 (8), pp. 2801-2815. https://doi.org/10.1177/1099636217727145
Article Title

Energy absorption in aluminium honeycomb cores reinforced with carbon fibre reinforced plastic tubes

ERA Journal ID39889
Article CategoryArticle
AuthorsAlantali, A. (Author), Alia, R. A. (Author), Umer, R. (Author) and Cantwell, W. J. (Author)
Journal TitleJournal of Sandwich Structures and Materials
Journal Citation21 (8), pp. 2801-2815
Number of Pages15
Year2019
Place of PublicationUnited Kingdom
ISSN1099-6362
1530-7972
Digital Object Identifier (DOI)https://doi.org/10.1177/1099636217727145
Web Address (URL)http://journals.sagepub.com/doi/abs/10.1177/1099636217727145
Abstract

The energy-absorbing behaviour of an aluminium honeycomb core reinforced with unidirectional and woven carbon fibre reinforced plastic composite tubes has been investigated experimentally at quasi-static rates of strain. Small diameter carbon fibre reinforced plastic tubes, with chamfered ends, were inserted into the cells of an aluminium honeycomb in order to yield a lightweight energy-absorbing material. The resulting data are compared with crushing tests on arrays of free-standing composite tubes, supported on a specially designed compression test fixture. The study continues with an investigation into size effects in the energy-absorbing response of these cellular materials, where compression tests are undertaken on four scaled sizes of reinforced honeycomb core.

Crushing tests on the multi-tube arrays have shown that woven carbon fibre reinforced plastic tubes absorb significantly greater levels of energy than their unidirectional counterparts. Here, the specific energy absorption did not vary with the number of tubes in the array, with values for the woven tubes averaging 110 kJ/kg and those for the unidirectional tubes averaging 75 kJ/kg. Inserting composite tubes into aluminium honeycomb served to increase the measured specific energy absorption of the core, resulting in values of specific energy absorption of up to 100 kJ/kg being recorded in the woven-based system. Tests on four scaled sizes of core have shown that the measured SEA does not vary with specimen size, indicating that data generated on small samples can be used to represent the energy-absorbing response of larger, more representative components.

Keywordscarbon fibre reinforced plastic, energy absorption, honeycomb, reinforced sandwich, tubes
ANZSRC Field of Research 2020401602. Composite and hybrid materials
Institution of OriginUniversity of Southern Queensland
Byline AffiliationsKhalifa University, United Arab Emirates
Centre for Future Materials
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