Compressive response of open-cell foams. Part I: Morphology and elastic properties

Gong, Lixin; Kyriakides, Stelios; Jang, Wen-Yea

doi:10.1016/j.ijsolstr.2004.07.023

Cited by 407 publications

(287 citation statements)

References 28 publications

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“…The last application, which is of our concern, involves high strain-rate deformation. The quasi-static behaviour of metal foams is well-known and documented [3][4][5][6][7][8][9]. Some studies deal with the high strain-rate response of cellular materials [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A constitutive model for the compressive response of metallic closed-cell foams including micro-inertia effects

Barthélémy

Jacques

Vermeersch³

et al. 2015

EPJ Web of Conferences

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Abstract.Metallic foams have known a keen interest in the last decades. Their ability to undergo very large deformations while transmitting low stress levels make them capable of performing functions of protective layers against intense loadings and of energy absorbers, for instance. The behaviour of metal foams varies considerably between quasi-static and dynamic regimes. Those differences can be linked to the strain-rate sensitivity of the skeleton material and to micro-inertial effects (induced by the crushing of the foam cells).In the present work, a micromechanical model has been developed to take into account micro-inertia effects on the macroscopic behaviour of closed-cell foams under dynamic loading conditions. The proposed modelling is based on the dynamic homogenisation procedure introduced by Molinari and Mercier (J. Mech. Phys. Solids 49 (2001) 1497-1516). Within this framework, the macrostress is the sum of two terms. The first one is a static stress, that can be described with any existing model of metal foam. The second contribution is a dynamic stress related to micro-inertia effects. Considering an initially spherical shell as a Representative Volume Element (RVE) of the foam material, a closed-form expression of the dynamic stress was obtained. The proposed modelling was applied to shock propagation in aluminium foams (it should however be noted that the present theory is not restricted to uniaxial deformation but can be applied to arbitrary loadings). From experimental data of the literature, it is observed that incorporating micro-inertia effects allows one to achieve a better description of the foam shock response. This indicates that micro-inertia may have a significant influence on the dynamic behaviour of metallic foams.

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Section: Introductionmentioning

confidence: 99%

A constitutive model for the compressive response of metallic closed-cell foams including micro-inertia effects

Barthélémy

Jacques

Vermeersch³

et al. 2015

EPJ Web of Conferences

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“…In fact, when the material under investigation is a cellular structure like polymeric foams, the identification of the mechanical properties of this "material" is no longer straightforward. In addition, the polymeric foams are actually a micro structure with micro mechanisms of structural failure combined with responses from the base material, which is a polymer [6][7] . Therefore, the determination of the mechanical properties and strength values of cellular materials requires an extra attention when analyzing the results from standard test.…”

Section: Introductionmentioning

confidence: 99%

Study of an anisotropic polymeric cellular material under compression loading

et al. 2012

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This paper emphasizes the influence of micro mechanisms of failure of a cellular material on its phenomenological response. Most of the applications of cellular materials comprise a compression loading. Thus, the study focuses on the influence of the anisotropy in the mechanical behavior of cellular material under cyclic compression loadings. For this study, a Digital Image Correlation (DIC) technique (named Correli) was applied, as well as SEM (Scanning Electron Microscopy) images were analyzed. The experimental results are discussed in detail for a closed-cell rigid poly (vinyl chloride) (PVC) foam, showing stress-strain curves in different directions and why the material can be assumed as transversely isotropic. Besides, the present paper shows elastic and plastic Poisson's ratios measured in different planes, explaining why the plastic Poisson's ratios approach to zero. Yield fronts created by the compression loadings in different directions and the influence of spring-back phenomenon on hardening curves are commented, also.

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“…[1][2][3][4][5] Theoretical and experimental studies show that porous metals have outstanding energy absorption properties. The main reason is that the work was done by the force to it when porous metals were compressed.…”

Section: Introductionmentioning

confidence: 99%

Compressive Property and Energy Absorption of Porous Sintered Fiber Metals

Qiao

Tang

et al. 2008

Mater. Trans.

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Porous sintered fiber metals with different relative densities were successfully prepared by using vacuum sintering process. Compressive property and energy absorption capacity of porous sintered fiber metals were investigated under quasi-static conditions. The results indicate that compressive stress-strain curves of porous sintered fiber metals exhibit three distinct deformation regions: elastic region, stress plateau region and densification region. The compressive property of porous sintered fiber metals can be interpreted by the Gibson-Ashby theory. It is found that compressive property, energy absorption capacity and energy absorption efficiency of porous sintered fiber metals present significant relative density sensitivity. The energy absorption capacity of the samples rises from 7.17 to 25.75 MJÁm À3 when relative density increases from 0.177 to 0.355.

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Compressive response of open-cell foams. Part I: Morphology and elastic properties

Cited by 407 publications

References 28 publications

A constitutive model for the compressive response of metallic closed-cell foams including micro-inertia effects

A constitutive model for the compressive response of metallic closed-cell foams including micro-inertia effects

Study of an anisotropic polymeric cellular material under compression loading

Compressive Property and Energy Absorption of Porous Sintered Fiber Metals

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