Quasi-Static Axial Crushing Behavior of Honeycomb-Filled Thin-Walled Aluminum Tubes

Levent Aktay1, §, Cem Çakıroğlu2, Mustafa Güden*, 2
1 German Aerospace Center, Institute of Structures and Design, Pfaffenwaldring 38-40, D-70569, Stuttgart, Germany
2 Department of Mechanical Engineering and Center for Materials Research, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir, Turkey

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© 2011 Aktay et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Mechanical Engineering and Center for Materials Research, Izmir Institute of Technology. Gulbahce Koyu, Urla, Izmir 35430, Turkey; Tel: +90 2327506779; Fax: +90 232 7507890; E-mail:
§ Currently at Daimler AG, Sindelfingen, Germany.


The experimental and numerical quasi-static crushing behaviors of Nomex honeycomb-filled thin-walled Al tubes were investigated. The honeycomb filler was modeled using a unit cell model. The numerical model and experimental results have shown that, 6.4 mm and 4.8 mm cell size honeycomb filling had no effect on the deformation mode (diamond); however 3.2 mm cell size honeycomb filling changed the deformation mode to mixed/concertina. Honeycomb filling was also shown to increase the specific energy absorption of filled tubes over that of Al tube. The specific energy absorption of honeycomb filling was further compared with those of tube wall thickening and Al closedcell foam filling.

Keywords: Honeycombs, Honeycomb-filled tubes, Finite element modeling.