Modeling the properties of closed-cell cellular materials from tomography images using finite shell elements

Caty, O.; Maire, Éric; Youssef, S.; Bouchet, R.

doi:10.1016/j.actamat.2008.07.023

Cited by 91 publications

(56 citation statements)

References 20 publications

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“…Using continuum elements, taking into consideration that the wall thickness is so small compared with the cell size, will lead to using few number of elements across the thickness, which can result in numerical problems. 21 Moreover, the research conducted by Caty et al 27 has revealed that continuum FE models should not be applied for closed-cell foams with low relative density. As a consequence, shell elements have been used to mesh the cell faces.…”

Section: Type Of Element and Boundary Conditionsmentioning

confidence: 99%

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Finite element modeling of compression behavior of extruded polystyrene foam using X-ray tomography

Sadek

Fouad

2013

Journal of Cellular Plastics

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Extruded polystyrene rigid foams have attracted a great attention as a superior loadbearing thermal insulation material since their implementation in building construction. One of the most common application areas of this type of thermal insulation material is under raft foundations, where the foam normally undergoes high levels of compression loads. The purpose of this research is to determine how to simulate and optimize the structural response of extruded polystyrene under compression stresses. The optimization has been achieved through investigating the relation between the foam microstructure and the global mechanical properties. The foam was first examined using X-ray tomography imaging technique to acquire some morphological information about the microstructure. The obtained morphological data of extruded polystyrene boards were then utilized to develop microstructure-based finite element models based on the socalled idealized realistic Kelvin cell. The finite element simulation was accomplished with the help of the nanoindentation technology to explore the mechanical properties of the cell wall material. The finite element models were validated by comparisons between the simulated and the experimental results. It has been found that the mechanical properties of the foam in different loading directions can be adequately simulated using the approach of the idealized realistic Kelvin cell. With the help of these models, a parameter study was carried out. This study included the effect of cell size and cell anisotropy on the mechanical response of extruded polystyrene boards under compression stresses. Charts relating between the foam microstructure characteristics and the compression behavior were generated based on the parametric study.

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Section: Type Of Element and Boundary Conditionsmentioning

confidence: 99%

“…24,27 All literatures surveyed in this research regarding the microstructure of foam materials have revealed that:…”

Section: Literature Reviewmentioning

confidence: 99%

Finite element modeling of compression behavior of extruded polystyrene foam using X-ray tomography

Sadek

Fouad

2013

Journal of Cellular Plastics

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“…However, the issue of the mechanical properties of the constitutive material, or often the materials, and its influence on the cellular material's effective behaviour, is rarely tackled with. For example in the case of metallic hollow-sphere stackings processed by sintering metallic powders many residual porosities are observed in the walls of the spheres [5,6]. Caty et al [6] have raised the issue of the influence of porosities on the mechanical behaviour of the constitutive material of the stackings to explain the required adjustment of the mechanical properties of the constitutive material to achieve a good agreement between the experiment and the modelling of such materials.…”

Section: Introductionmentioning

confidence: 99%

“…For example in the case of metallic hollow-sphere stackings processed by sintering metallic powders many residual porosities are observed in the walls of the spheres [5,6]. Caty et al [6] have raised the issue of the influence of porosities on the mechanical behaviour of the constitutive material of the stackings to explain the required adjustment of the mechanical properties of the constitutive material to achieve a good agreement between the experiment and the modelling of such materials. Such an effect of the porosities has been asserted by Marcadon and Feyel [7] using a micromechanical approach.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature numerous studies deal with the role of the architecture of cellular structures (cell geometry and arrangement) on their effective mechanical behaviour, one can cite for example [2][3][4][5] as concerns hollow-sphere stackings. Some original approaches, coupling X-Ray tomography characterization and the finite-element method for example [6], have been proposed to capture as accurately as possible the complex architecture of such materials. However, the issue of the mechanical properties of the constitutive material, or often the materials, and its influence on the cellular material's effective behaviour, is rarely tackled with.…”

Section: Introductionmentioning

confidence: 99%

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About the use of micro-indentation to determine the constitutive material’s mechanical behaviour of cellular structures

Marcadon

Passilly

Davoine

et al. 2010

EPJ Web of Conferences

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Abstract. Architectured cellular materials seem to be very promising materials since they can combine interesting specific mechanical, acoustical and thermal properties. Nevertheless the process routes used to elaborate such materials, especially the thermal treatments and the added compounds, may alter their constitutive materials for which the mechanical behaviour becomes unknown. In order to determine locally the mechanical behaviour of the constitutive materials of cellular structures we propose the use of microindentation. The model structures considered here are brazed tube stackings. Macroscopic tensile tests and micro-indentation measurements have been performed on isolated tubes having been submitted to different thermal treatment durations. The mechanical properties estimated thanks to both methods show a good agreement. These results also put in evidence the strong influence of the thermal treatment on the behaviour of the constitutive material of the tubes. Micro-indentation measurements performed in the braze joints gave access to their mechanical properties which are strongly heterogeneous. A comparison between the experimental mechanical response of the tube stackings under compression and the one predicted by the finite-element method is proposed too.

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Ultra Fast Tomography: New Developments for 4D Studies in Material Science

Lhuissier

Scheel

Michiel

et al. 2013

1^stInternational Conference on 3D Materials Science

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Modeling the properties of closed-cell cellular materials from tomography images using finite shell elements

Cited by 91 publications

References 20 publications

Finite element modeling of compression behavior of extruded polystyrene foam using X-ray tomography

Finite element modeling of compression behavior of extruded polystyrene foam using X-ray tomography

About the use of micro-indentation to determine the constitutive material’s mechanical behaviour of cellular structures

Ultra Fast Tomography: New Developments for 4D Studies in Material Science

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