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

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

doi:10.1016/j.mechrescom.2018.08.005

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

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

Naval Architecture, Ocean And Marine Engineering

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	13-20
Number of pages	8
Journal	Mechanics Research Communications
Volume	94
Early online date	17 Aug 2018
DOIs	https://doi.org/10.1016/j.mechrescom.2018.08.005
Publication status	Published - 1 Dec 2018

Keywords

compression testing
crush band propagation
metal foams
steel hollow sphere assemblies

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10.1016/j.mechrescom.2018.08.005

Yiatros-etal-MRC-2018-Compressive-properties-of-granular-foams-of-adhesively-bonded-steel-hollowAccepted author manuscript, 476 KBLicence: CC BY-NC-ND 4.0

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title = "Compressive properties of granular foams of adhesively bonded steel hollow sphere blocks",

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.",

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AU - Yiatros, Stylianos

AU - Marangos, Orestes

AU - Votsis, Renos A.

AU - Brennan, Feargal P.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - 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.

AB - 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.

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