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In-plane effective shear modulus of generalized circular honeycomb structures and bundled tubes in a diamond array structure

Gotkhindi, Tejas P and Simha, KRY (2015) In-plane effective shear modulus of generalized circular honeycomb structures and bundled tubes in a diamond array structure. In: INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 101 . pp. 292-308.

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Official URL: http://dx.doi.org/10.1016/j.ijmecsci.2015.08.009 ...


Use of circular hexagonal honeycomb structures and tube assemblies in energy absorption systems has attracted a large number of literature on their characterization under crushing and impact loads. Notwithstanding these, effective shear moduli (G*) required for complete transverse elastic characterization and in analyses of hierarchical structures have received scant attention. In an attempt to fill this void, the present study undertakes to evaluate G* of a generalized circular honeycomb structures and tube assemblies in a diamond array structure (DAS) with no restriction on their thickness. These structures present a potential to realize a spectrum of moduli with minimal modifications, a point of relevance for manufactures and designers. To evaluate G* in this paper, models based on technical theories - thin ring theory and curved beam theory - and rigorous theory of elasticity are investigated and corroborated with FEA employing contact elements. Technical theories which give a good match for thin HCS offer compact expressions for moduli which can be harvested to study sensitivity of moduli on topology. On the other hand, elasticity model offers a very good match over a large range of thickness along with exact analysis of stresses by employing computationally efficient expressions. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords: Circular honeycomb/tubular structures; Effective shear modulus; In-plane mechanical properties; Analytical modeling; Elasticity; Design maps
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 17 Dec 2015 06:53
Last Modified: 17 Dec 2015 06:53
URI: http://eprints.iisc.ac.in/id/eprint/52849

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