CUED Publications database

The predicted compressive strength of a pyramidal lattice made from case hardened steel tubes

St-Pierre, L and Fleck, NA and Deshpande, VS (2014) The predicted compressive strength of a pyramidal lattice made from case hardened steel tubes. International Journal of Solids and Structures, 51. pp. 41-52. ISSN 0020-7683

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Abstract

A sandwich panel with a core made from solid pyramidal struts is a promising candidate for multifunctional application such as combined structural and heat-exchange function. This study explores the performance enhancement by making use of hollow struts, and examines the elevation in the plastic buckling strength by either strain hardening or case hardening. Finite element simulations are performed to quantify these enhancements. Also, the sensitivity of competing collapse modes to tube geometry and to the depth of case hardening is determined. A comparison with other lattice materials reveals that the pyramidal lattice made from case hardened steel tubes outperforms lattices made from solid struts of aluminium or titanium and has a comparable strength to a core made from carbon fibre reinforced polymers. © 2013 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Finite element analysis Lattice materials Plastic buckling Sandwich panels
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:05
Last Modified: 08 Dec 2014 02:16
DOI: 10.1016/j.ijsolstr.2013.09.008