In-plane effective shear modulus of generalized circular honeycomb structures and bundled tubes in a diamond array structure
Data(s) |
2015
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Resumo |
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. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/52849/1/Int_Jou_Mec_Sci_101_292_2015.pdf 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. |
Publicador |
PERGAMON-ELSEVIER SCIENCE LTD |
Relação |
http://dx.doi.org/10.1016/j.ijmecsci.2015.08.009 http://eprints.iisc.ernet.in/52849/ |
Palavras-Chave | #Mechanical Engineering |
Tipo |
Journal Article PeerReviewed |