Compressive properties of granular foams of adhesively bonded steel hollow sphere blocks

Stylianos Yiatros, Orestes Marangos, Renos A. Votsis, Feargal P. Brennan

Research output: Contribution to journalArticle

3 Citations (Scopus)
1 Downloads (Pure)

Abstract

Steel hollow spheres adhesively bonded together as a granular composite metal foam, is a special type of porous metal that aims to combine low weight, with ductility and energy absorption. Hollow spheres comprising steel foam shells were coated with a thermally activated epoxy in order to form different specimen geometries upon moulding and curing. The collapse propagation and energy absorption of steel hollow sphere blocks, comprising spheres of different sizes, was investigated experimentally, quantifying quasi-elastic and nonlinear properties of the steel hollow sphere assemblies in compression and comparing them with analytical and semi-empirical rules based on porous metal density and sphere packing. The results identify the initiation and nature of damage and highlight the merits of the material in absorbing high compressive deformations without significant loss of integrity.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalMechanics Research Communications
Volume94
Early online date17 Aug 2018
DOIs
Publication statusPublished - 1 Dec 2018

Keywords

  • compression testing
  • crush band propagation
  • metal foams
  • steel hollow sphere assemblies

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