The in-plane linear elastic constants and out-of-plane bending of 3-coordinated ligament and cylinder-ligament honeycombs

Alderson, Andrew, Alderson, K. L., Chirima, G T., Ravirala, N. and Zied, K. (2010) The in-plane linear elastic constants and out-of-plane bending of 3-coordinated ligament and cylinder-ligament honeycombs. Composites Science and Technology, 70 (7). pp. 1034-1041. ISSN 0266-3538

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Abstract

Four novel cylinder-ligament honeycombs are described, where each cylinder has 3 tangentially-attached ligaments to form either a hexagonal or re-entrant hexagonal cellular network. The re-entrant cylinder-ligament honeycombs are reported for the first time. The in-plane linear elastic constants and out-of-plane bending response of these honeycombs are predicted using Finite Element (FE) modelling and comparison made with hexagonal and re-entrant hexagonal honeycombs without cylinders. A laser-crafted re-entrant cylinder-ligament honeycomb is manufactured and characterized to verify the FE model. The re-entrant honeycombs display negative Poisson's ratios and synclastic curvature upon out-of-plane bending. The hexagonal and 'trichiral' honeycombs possess positive Poisson's ratios and anticlastic curvature. The 'anti-trichiral' honeycomb (short ligament limit) displays negative Poisson's ratios when loaded in the plane of the honeycomb, but positive Poisson's ratio behaviour (anticlastic curvature) under out-of-plane bending. These responses are understood qualitatively through considering deformation occurs via direct ligament flexure and cylinder rotation-induced ligament flexure.

Item Type: Article
Additional Information: The definitive version of this article was published in Composites Science and Technology, published by Elsevier - Copyright 2009 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords: Smart materials,Mechanical properties,Deformation,Elastic properties,Finite element analysis (FEA)
Divisions: University of Bolton Research Centres > Institute for Materials Research and Innovation
Depositing User: Scott Wilson
Date Deposited: 26 Nov 2013 12:53
Last Modified: 22 Jan 2014 11:13
Identification Number: 10.1016/j.compscitech.2009.07.010
URI: http://ubir.bolton.ac.uk/id/eprint/56

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