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

L. St-Pierre, N. A. Fleck*, V. S. Deshpande

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)41-52
Number of pages12
JournalInternational Journal of Solids and Structures
Volume51
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • Finite element analysis
  • Lattice materials
  • Plastic buckling
  • Sandwich panels

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