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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Abstract

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
Publication:	INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
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
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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