Macro and micro collapse mechanisms of closed-cell aluminium foams during quasi-static compression

Kader, M. A.; Islam, Md. Ariful; Saadatfar, Mohammad; Hazell, Paul J.; Brown, A. D.; Ahmed, Shakil; Escobedo, J. P.

doi:10.1016/j.matdes.2017.01.011

Cited by 119 publications

(56 citation statements)

References 49 publications

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“…The mechanical properties of some gas injection aluminum foams have been reported, such as the static gas injection aluminum foam [11,30], Aluhab prepared by ultrasonic oscillation method [31] and aluminum foam prepared by rotating gas injector [32]. There have also been some research about Cymat aluminum foams, but their cell size uniformity was not satisfactory [33,34]. Dynamic gas injection method assisted with high-speed horizontal oscillation could significantly reduce the cell size and improve the cell quality [29], so the compressive performance and deformation mechanism of this dynamic gas injection aluminum foam deserve to be studied in detail.…”

Section: Introductionmentioning

confidence: 99%

“…The modes usually contain the formation of plastic hinges, tearing, fracture and buckling of cell membranes [15,35]. At present, methods for characterizing cell deformation mainly include photographs of the deformation process [30], scanning electron microscope (SEM) [36], and X-ray tomography [33,37,38]. Cell deformation is difficult to be observed clearly by the pictures in compression due to the resolution limit [30].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the deformation of each cell can be affected by the surrounding cells, and the deformation of cells in outer surface is not that representative due to fewer constraints compared to the internal cells. Some researchers used finite element simulations based on the model from X-ray tomography to study the cell deformation, but it is hard to consider all factors in the simulation of the compressive process [33,37]. C. Petit et al [38] used the in-situ test coupled with X-ray tomography in the study of open-cell aluminum foam, and showed that this can be a proper way to characterize the cell deformation.…”

Section: Introductionmentioning

confidence: 99%

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Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Wang

Maire

Chen

et al. 2019

Materials Characterization

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The dynamic gas injection method with high-speed horizontal oscillation could reduce the cell size and improve the cell quality of aluminum foams, so it is of interest to study the compressive performance and deformation mechanism of the foams produced with this process. In-situ compression in X-ray tomography was used for this research. Results have shown that the plateau stresses of bulk aluminum foams prepared by the dynamic gas injection method are in the range of 0.3 ~ 11 MPa. When the cell size is reduced to around 1 mm, the plateau stress could reach 22 MPa. In addition, the brittle deformation characteristics of aluminum foams in the quasi-static compression process are obvious. The dynamic gas injection method could greatly improve the mechanical properties of aluminum foams, and aluminum foams prepared by this method have a better compressive performance compared to that prepared by static method even at the same relative density. The uniformity of the cell size and sphericity also affects the mechanical properties. The result of in-situ compression shows that there are two main failure modes for cell walls of aluminum foams: the fracture after buckles of the cell walls and the direct fracture of the cell walls. The aluminum foams prepared by the dynamic gas injection method could have a wide application prospect due to its superior compressive performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Wang

Maire

Chen

et al. 2019

Materials Characterization

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“…This goes ahead to emphasize that pore-scale deformation is significantly impacted by the particle shape geometry. Although research has shown that the predominant mechanism for microscale deformation is due to wall thickness (Kader et al, 2017), in this study, it is indicated that solid deformation and reduction in flow conductivity is mainly due to the particle shapes. The sphere packing was intricately designed to ensure similar structural characteristics as the realistic sandstone geometry.…”

Section: 1029/2017wr022242mentioning

confidence: 58%

Interaction Between Fluid and Porous Media with Complex Geometries: A Direct Pore‐Scale Study

Fagbemi

Tahmasebi

Piri

2018

Water Resources Research

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Effect of boundary stress on permeability in porous media at pore‐scale is investigated by means of numerical methods for computing deformation of rock material in the presence of pore fluid. We implement a partitioned, strongly coupled solver for transient fluid‐solid simulations with independent conformed interface meshes for the fluid and solid domains. Fluid flow and solid computations were performed using the finite element method. External load is prescribed along the solid boundary in gradual steps to examine the extent of pore‐scale deformation along internal grain walls while applying a fixed constraint at the opposite end to ensure uniform stress distribution across the media. Hydrodynamic interactions between the pore walls and the matrix leading to interface displacements by fluid viscous forces are also investigated by examining fluid flow with different combinations of Reynolds number. Coupling is achieved via traction and displacements boundary conditions at the interface with respect to Lagrangian coordinates. The role of particle shape in the matrix deformation process is also considered in this paper. In order to examine the how particle shape affects local affects local permeability/stress, we examine fluid movement based on varying Reynolds numbers in Berea sandstone obtained from Micro‐CT image scans at high resolution, and artificially constructed random polydisperse 3‐D sphere packs. It was found that permeability alteration under the influence of uniaxial stress was more in the sandstone sample than in the sphere‐pack and that the sphere‐pack deformed less than the actual sample due to pore geometry, surface smoothness, and homogeneity.

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“…Many authors investigated the effect of the microstructure on the compressive response of foams experimentally [8,9,10,2,11,12]. Due to the complexity of the manufacturing methods and of experimental tests, investigating the influence of each morphological parameter separately is not possible.…”

Section: Introductionmentioning

confidence: 99%

Efficient computational modelling of closed cell metallic foams using a morphologically controlled shell geometry

Ghazi

Tiago

Sonon

et al. 2020

International Journal of Mechanical Sciences

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This contribution addresses the finite element modelling of closed cell metallic foams using Representative Volume Elements (RVEs) based on shell geometries directly extracted from implicitly defined 3D geometries. 3D RVEs of closed cell foam materials are produced by means of a generation strategy allowing a close morphological control reproducing fine scale geometrical features incorporating cell size, cell wall thickness and cell wall curvature distributions. The strategy is built on three computational ingredients: (i) a random packing algorithm based on random sequential addition assisted by neighbour distance control, (ii) a distance field-based shape tessellation (morphing) that allows incorporating cell wall curvatures and varying cell wall thicknesses and (iii) a close control on the shape of the cells. In order to decrease the computational cost of a full 3D finite element model, an original approach is proposed to produce a shell-based geometry directly from 3D information. Extracting the shell geometry from the implicitly defined 3D geometry based on the zero level of distance fields that would represent the cell walls is computationally impossible. Therefore, a novel robust procedure is proposed using careful cutting operations on distance fields for this purpose. The effect of the different microstructural geometrical features of interest on the average mechanical behaviour of the foam is investigated using shell-based finite element analyses. The computational cost and the accuracy of the proposed shell models are then assessed by comparing their results to full 3D simulations. The macroscopic behaviour of the generated shell-based model under compressive loading is then assessed up to the densification stage (including contact), and compared qualitatively with experiments from the literature. The macroscopic behaviour of the shell-based model is explained by linking it to cell/wall level deformation mechanisms.

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Macro and micro collapse mechanisms of closed-cell aluminium foams during quasi-static compression

Cited by 119 publications

References 49 publications

Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Compressive performance and deformation mechanism of the dynamic gas injection aluminum foams

Interaction Between Fluid and Porous Media with Complex Geometries: A Direct Pore‐Scale Study

Efficient computational modelling of closed cell metallic foams using a morphologically controlled shell geometry

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