X-ray tomography applied to the characterization of cellular materials. Related finite element modeling problems

Maire, Éric; Fazekas, Arnaud; Salvo, Luc; Dendievel, Rémy; Youssef, S.; Cloetens, Peter; Létang, J M

doi:10.1016/s0266-3538(03)00276-8

Cited by 198 publications

(114 citation statements)

References 15 publications

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“…The reconstruction of the structure is often supported by X-ray tomography [55][56][57][58][59][60] and relies on analytical approaches (for example by Zsoldos et al [61]). Bardella and Genna published papers on the determination of the elastic properties of syntactic foams [62][63][64].…”

Section: Introductionmentioning

confidence: 99%

Compressive behaviour of aluminium matrix syntactic foams reinforced by iron hollow spheres

et al. 2015

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HighlightsLow pressure infiltration is suitable to produce MMSFs with hollow iron spheres.The MMSFs showed plastic yielding and long, slowly ascending plateau region.The matrix and the heat treatment strongly influence the properties of the MMSFs.The full-scale FEM model gives excellent agreement compared to the measured values. Highlights (for review) *Manuscript Click here to view linked References AbstractAluminium alloy syntactic foams reinforced with iron hollow spheres were produced by low pressure, liquid phase inert gas infiltration technique. Four Al alloys (Al99.5, AlSi12, AlMgSi1 and AlCu5) and Globomet grade iron hollow spheres were used as matrix and reinforcing material, respectively. The produced composite blocks were characterised according to the ruling standard for compression of cellular materials in order to ensure full comparability. The compressive test results showed plastic yielding and a long, slowly ascending plateau region that ensures large energy absorption capability. The proper selection of the matrix material and the applied heat treatment allows for a wide range of tailoring of the mechanical properties. For design purposes, the full-scale finite element method (FEM) model of the investigated foams was created and tested on Al99.5 matrix foams. The FEM results showed very good agreement with the measured values (typically within 5% in the characteristic properties and within 10% for the whole compression curve).

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Section: Introductionmentioning

confidence: 99%

Compressive behaviour of aluminium matrix syntactic foams reinforced by iron hollow spheres

et al. 2015

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“…This technique allows determination of bulk properties and gathering of localized information at the micron scale, which is essential to understand the factors controlling pressureless infiltration. 31,34,35,[37][38][39][40][41][42][43] The measurement leaves the samples intact, and the infiltration experiments can be made on the same samples.…”

Section: B Preform Characterizationmentioning

confidence: 99%

“…Several data procedure techniques have already been developed. [34][35][36][37][38][39][40][41][42][43][44][45][46][47] In the present work, the raw transmission images were backprojected using the ConeRec program from Skyscan, 38 which is based on a modified Feldkamp algorithm 48 [ Fig. 3(a)].…”

Section: B Preform Characterizationmentioning

confidence: 99%

“…Quantitative CT data analysis can also be hampered by limitation in the computing power of PCs. [40][41][42][43][44][45][46] The main goal of this investigation was the complete characterization of the porous ceramic performs by CT and to validate the technique using the results from the classical methods as benchmark. The porosity, pore size and its distribution, and spatial distribution of titanium as an activator within the preforms were determined.…”

Section: Introductionmentioning

confidence: 99%

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X-ray computed micro tomography as complementary method for the characterization of activated porous ceramic preforms

et al. 2007

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X-ray computed micro tomography (CT) is an alternative technique to the classical methods such as mercury intrusion (MIP) and gas pycnometry (HP) to obtain the porosity, pore-size distribution, and density of porous materials. Besides the advantage of being a nondestructive method, it gives not only bulk properties, but also spatially resolved information. In the present work, uniaxially pressed porous alumina performs activated by titanium were analyzed with both the classical techniques and CT. The benefits and disadvantages of the applied measurement techniques were pointed out and discussed. With the generated data, development was proposed for an infiltration model under ideal conditions for the production of metal matrix composites (MMC) by pressureless melt infiltration of porous ceramic preforms. Therefore, the reliability of the results, received from different investigation techniques, was proved statistically and stereologically.

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“…Syntactic foam structure was analysed and the threedimensional CAD model was established in [33]. Three mesh generating methods (Voronoi description of the microstructure, voxel meshes, and tetrahedral meshes) using tomographic images of the actual shape of cellular structures were investigated in [34]. The exact geometrical data of single sintered metallic hollow spheres were obtained by CT scanning, and the corresponding finite element models were created in [35].…”

Section: Introductionmentioning

confidence: 99%

Compressive Response Determination of Closed-Cell Aluminium Foam and Linear-Elastic Finite Element Simulation of μCT-Based Directly Reconstructed Geometrical Models

2018

SV-JME

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Metal foams have a lightweight cellular structure with excellent mechanical and physical properties. It is well known that metal foams have high compression strength combined with good energy absorption characteristics [1]. Therefore, the interest in these materials is widespread not only as a vibration damper or sound absorber but also as a load-bearing structural element. Numerous applications rely on the compressive property of metal foams, which directly depend on its structure. As a load-bearing structural element (e.g. vehicle part, biomedical implant) metal foam is expected to behave elastically under working circumstances, so the material response must be predicted precisely in the elastic region. Numerical determination of compressive properties of foam structure remains a demanding engineering task, and it is indispensable for design purposes.A number of studies have reported on measuring the material response of different types of metal foams in destructive ways. Geometrical modelling is an essential part of the procedure aiming the investigation of metal foam structures in a numerical way. Numerous approaches can be found in the literature for the proper description of foam structures, one of which is the usage of uniform cell models which results in simplified geometry compared with the actual structure. A combination of spherical and cruciform-shaped cells was used to model closed-cell aluminium foam and to simulate its material response in [11], while different uniform cell structures were applied to the model and simulate open cell metal foams in [12] to [14]. Diamond and cubic cell foam structure were also used to simulate the effect of cell shape on the mechanical behaviour of open cell metal foams in [15].Since the inner structure of different types of metal foams is quite complicated, a surface analysis can result in imperfect or false data. Recent studies proved X-ray computed tomography to be an efficient and powerful tool for mapping the complete structure • Calculations based on geometrical model precisely described the compressive response in the elastic region. Compressive Response Determination of Closed-Cell Aluminium Foam and Linear-Elastic Finite Element Simulation of µCT-Based Directly Reconstructed Geometrical Models

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X-ray tomography applied to the characterization of cellular materials. Related finite element modeling problems

Cited by 198 publications

References 15 publications

Compressive behaviour of aluminium matrix syntactic foams reinforced by iron hollow spheres

Compressive behaviour of aluminium matrix syntactic foams reinforced by iron hollow spheres

X-ray computed micro tomography as complementary method for the characterization of activated porous ceramic preforms

Compressive Response Determination of Closed-Cell Aluminium Foam and Linear-Elastic Finite Element Simulation of μCT-Based Directly Reconstructed Geometrical Models

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