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Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications

P.S. Liu (Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing, China)
X.M. Ma (Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China)

Multidiscipline Modeling in Materials and Structures

ISSN: 1573-6105

Article publication date: 12 May 2021

Issue publication date: 7 June 2021

145

Abstract

Purpose

The purpose of this paper is to provide a summarization and review of the present author's main investigations on failure modes of reticular metal foams under different loadings in engineering applications.

Design/methodology/approach

With the octahedral structure model proposed by the present authors themselves, the fundamentally mechanical relations have been systematically studied for reticular metal foams with open cells in their previous works. On this basis, such model theory is continually used to investigate the failure mode of this kind of porous materials under compression, bending, torsion and shearing, which are common loading forms in engineering applications.

Findings

The pore-strut of metal foams under different compressive loadings will fail in the tensile breaking mode when it is brittle. While it is ductile, it will tend to the shearing failure mode when the shearing strength is half or nearly half of the tensile strength for the corresponding dense material and to the tensile breaking mode when the shearing strength is higher than half of the tensile strength to a certain value. The failure modes of such porous materials under bending, torsional and shearing loads are also similarly related to their material species.

Originality/value

This paper presents a distinctive method to conveniently analyze and estimate the failure mode of metal foams under different loadings in engineering applications.

Keywords

Acknowledgements

This work was supported in part by the Testing Foundation of BNU grant no. C20, and this support is appreciated.

Citation

Liu, P.S. and Ma, X.M. (2021), "Special review: Mechanical investigation on failure modes of reticular porous metal foams under different loadings in engineering applications", Multidiscipline Modeling in Materials and Structures, Vol. 17 No. 4, pp. 814-840. https://doi.org/10.1108/MMMS-11-2020-0279

Publisher

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Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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