The behaviour of curved-crease foldcores under low-velocity impact loads

Gattas, J. M. and You, Z. (2015) The behaviour of curved-crease foldcores under low-velocity impact loads. International Journal of Solids and Structures, 53 80-91. doi:10.1016/j.ijsolstr.2014.10.019

Author Gattas, J. M.
You, Z.
Title The behaviour of curved-crease foldcores under low-velocity impact loads
Journal name International Journal of Solids and Structures   Check publisher's open access policy
ISSN 0020-7683
Publication date 2015-01-15
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.ijsolstr.2014.10.019
Open Access Status Not yet assessed
Volume 53
Start page 80
End page 91
Total pages 12
Place of publication Kidlington, Oxford United Kingdom
Publisher Pergamon Press
Language eng
Subject 2611 Modelling and Simulation
2500 Materials Science
3104 Condensed Matter Physics
2211 Mechanics of Materials
2210 Mechanical Engineering
2604 Applied Mathematics
Abstract The primary aim of this paper was to manufacture aluminium curved-crease foldcores and assess their behaviour under quasi-static compressive loads, relative to existing straight-crease foldcores and a honeycomb cores. Four foldcore types, standard, indented, and two curved-crease foldcore tessellations, were constructed with comparable density and height to a commercial honeycomb core. An experimental and numerical study of foldcore performance under quasi-static crush loads showed that all foldcore types were highly sensitive to geometric imperfections, and that curved-crease foldcores had significantly higher energy-absorption capability than straight-crease foldcores. Validated numerical methods were used in a comprehensive parametric study on curved-crease foldcore geometry, with two main findings. First, it was seen that altering the curved-crease foldcore tessellation did not provide significant energy-absorption capability beyond that achievable with direct changes to the core aspect ratio. Second, an optimum configuration of the curved-crease foldcore was found which appeared to offer a comparable out-of-plane strength, energy-absorption under quasi-static compressive loads, and stiffness to a honeycomb core. A brief numerical investigation into low-velocity impact loading showed that curved-crease foldcores were the only foldcore type that saw a substantial inertial strengthening under dynamic loading, although not to as large an extent as honeycomb.
Keyword Curved-crease
Quasi-static compression
Low-velocity impact
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 28 Oct 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 21 times in Scopus Article | Citations
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