Triaxial compression of aluminium foams

Ruan, Dong; Lu, Guoxing; Ong, Lin Seng; Wang, Bin

doi:10.1016/j.compscitech.2006.05.005

Cited by 74 publications

(37 citation statements)

References 23 publications

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“…Deshpande and Fleck [6] have applied axisymmetric compressive loadings, uniaxial and hydrostatic, obtaining the yield surface and its evolution, according to two different isotropic models; analogous experiments have been carried out by Ruan et al [7]. This type of testing requires special pressurised chambers, in which the specimen is immersed.…”

Section: Introductionmentioning

confidence: 96%

Measurement of longitudinal and transverse strain in an aluminium foam

Goglio¹,

Vassoler

Peroni

2011

Materialwissenschaft Werkst

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This paper presents an experimental study on a closed-cell aluminium foam (ALPORASm), carried out with the final goal of obtaining data required to identify the parameters of a constitutive model of such material. The work consists mainly of compression tests on prismatic specimens, from which the load-displacement curves are obtained. Several tests have been carried out to assess the influence of strain rate, in the low-value range 10 -3 -10 -1 s -1, and foam density variation, due to the slight difference between samples taken from the inner or the outside of a foam block. The results show that the effect of the strain rate, although small, is noticeable, and becomes more relevant when the material has higher density, in accordance with previous studies. Measuring the strain in the foam requires special procedures because of its heterogeneity; the typical choice is in favour of non-contact methods. In this work, the Digital Image Correlation has been used to obtain the displacement field on the specimen surface: the track of each marker point in a chosen set has been determined, then the strain field has been assessed with an interpolation based on a strain-displacement matrix like in the finite element method. The obtained relationship between longitudinal and transverse average strain is non-linear and influenced by the strain rate, which corresponds to a non-constant apparent Poisson's ratio.

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Section: Introductionmentioning

confidence: 96%

Measurement of longitudinal and transverse strain in an aluminium foam

Goglio¹,

Vassoler

Peroni

2011

Materialwissenschaft Werkst

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“…4). In this article are presented ideas reported in (Gioux et al 2000;Ashby et al 2000;Ruan et al 2007); thus, most details cited here refer to particular conditions present in the mentioned studies. Fig.…”

Section: Triaxal Tension-compression and Compressionmentioning

confidence: 99%

“…(Blazy et al 2004;Ruan et al 2007;Gioux et al 2000). From this source one learns how reported experiments were conducted and how the results were gathered in each case.…”

Section: Introductionmentioning

confidence: 99%

“…Deshpande and Fleck (Deshpande and Fleck 2000) advise to measure plastic Poisson s ratio instead of the elastic value, because the latter for aluminium foams is close to 0 and is difficult to be measured experimentally. But Ruan et al in (Ruan et al 2007) point out that the plastic value is also not easy to be measured, since cellular metals undergo nonuniform deformation at 20÷30% strains. A kind of solution here may be averaging of Poisson s ratio measurements for more samples.…”

Section: Determination Of Young S Modulus and Poisson S Ratiomentioning

confidence: 99%

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Methodology for Experimental Investigations of Metal Foams and Their Mechanical Properties

Stręk

2012

mech

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SUMMARYThis paper presents a comprehensive, systematic approach on experimental investigations of structure and mechanical properties of metal foams. Based on a thorough state of the art study, the existing solutions have been synthesised with recent developments in the discussed field to become a proposition of a possibly complete methodology for observation and testing of cellular metals. Material properties acquired in the described manners can constitute reliable reference result base e.g. for identification and verification of failure criteria. This paper describes sample preparation procedures and next discusses techniques which enable one to characterise foam structure. There are also presented procedures for determining strength limits in different load cases: uniaxial tension or compression, shear and torsion as well as multiaxial states. The tests are discussed in terms of their specific application to study cellular metallic materials.Keywords: metal foams, tensile tests of foams, compression tests of foams, multiaxial tests of foams, shear tests of foams METODOLOGIA BADAÑ EKSPERYMENTALNYCH PIAN METALICZNYCH I ICH W£ASNO CI MECHANICZNYCH Przedstawiono kompleksowe, systematyczne podej cie do badañ do wiadczalnych struktury i w³a ciwo ci mechanicznych pian metalowych. Na podstawie dog³êbnej analizy stanu rzeczy rozwi¹zania istniej¹ce zsyntetyzowano, uwzglêdniaj¹c najnowsze zmiany w omawianym zakresie tak, aby przedstawiae propozycje mo¿liwie pe³nej metodologii obserwacji i badañ metali komórkowych. Wla ciwo ci materia³u uzyskane w czasie zaproponowanych testów mog¹ stanowiae wiarygodn¹ bazê odno nych wyników, np. do identyfikacji i weryfikacji kryteriów wytê¿enia. Opisano procedury przygotowania próbek, a nastêpnie omówiono techniki umo¿liwiaj¹ce scharakteryzowanie struktury piany. Przedstawiono równie¿ procedury okre lania granic wytrzyma³o ci w ró¿nych przypadkach obci¹¿e-nia: jednoosiowego rozci¹gania lub ciskania, cinania i skrêcania oraz wieloosiowych stanach obci¹¿enia. Badania zosta³y omówione w odniesieniu do szczególnego zastosowania ich do zbadania komórkowych materia³ów metalicznych.S³owa kluczowe: pianki metaliczne, próba rozci¹gania pianek, próba ciskania pianek, próba wieloosiowa pianek, test cinania pianek

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“…A phenomenological failure criterion is presented to predict the measured failure surfaces for Alporas and Hydro closed-cell uminium foams. Ruan et al (2007) employed a custom-built triaxial testing apparatus to investigate the effect of strain rate in the experimental failure surface of CYMAT closed-cell aluminum foams. Recently, Combaz et al (2010aCombaz et al ( , 2011) used a triaxial testing device to perform a series of multiaxial experiments on replicated aluminum foam.…”

Section: Introductionmentioning

confidence: 99%

Impact Response of Aluminium Alloy Foams Under Complex Stress States

Zhou

Wang

et al. 2016

Lat. Am. j. solids struct.

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A series of dynamic tests were conducted on a closed-cell aluminum alloy foams in order to determine experimental failure surface under impact loading conditions. Quasi-static tests have also been performed to investigate failure mechanism under different stress paths. Three typical types of deformation modes can be observed, which corresponds to the different failure mechanism. The failure loci of the foam in principal stress plane are explored from quasistatic to dynamic loading conditions. A significant strength enhancement is identified experimentally. The expansion of the failure locus from the quasi-static to the dynamic test is almost isotropic. A modified failure criterion for the metallic foam is proposed to predict failure locus as a function of strain rate. This rate-dependence failure criterion is capable of giving a good description of the biaxial failure stresses over a wide range of the strain rates.

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Triaxial compression of aluminium foams

Cited by 74 publications

References 23 publications

Measurement of longitudinal and transverse strain in an aluminium foam

Measurement of longitudinal and transverse strain in an aluminium foam

Methodology for Experimental Investigations of Metal Foams and Their Mechanical Properties

Impact Response of Aluminium Alloy Foams Under Complex Stress States

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