Modelling and characterization of cell collapse in aluminium foams during dynamic loading

M. A. Kader; M. A. Islam; P. J. Hazell; J. P. Escobedo; M. Saadatfar; A. D. Brown; G. J. Appleby-Thomas

doi:10.1016/j.ijimpeng.2016.05.020

Modelling and characterization of cell collapse in aluminium foams during dynamic loading

M. A. Kader, M. A. Islam, P. J. Hazell^*, J. P. Escobedo, M. Saadatfar, A. D. Brown, G. J. Appleby-Thomas

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

59 Citations (Scopus)

Abstract

Plate-impact experiments have been conducted to investigate the elastic-plastic behaviour of shock wave propagation and pore collapse mechanisms of closed-cell aluminium foams. FE modelling using a meso-scale approach has been carried out with the FE software ABAQUS/Explicit. A micro-computed tomography-based foam geometry has been developed and microstructural changes with time have been investigated to explore the effects of wave propagation. Special attention has been given to the pore collapse mechanism. The effect of velocity variations on deformation has been elucidated with three different impact conditions using the plate-impact method. Free surface velocity (u_fs) was measured on the rear of the sample to understand the evolution of the compaction. At low impact velocities, the free-surface velocity increased gradually, whereas an abrupt rise of free-surface velocity was found at an impact velocity of 845 m/s with a copper flyer-plate which correlates with the appearance of shock. A good correlation was found between experimental results and FE predictions.

Original language	English
Pages (from-to)	78-88
Number of pages	11
Journal	International Journal of Impact Engineering
Volume	96
DOIs	https://doi.org/10.1016/j.ijimpeng.2016.05.020
Publication status	Published - 1 Oct 2016

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@article{e330d29032c84a65b7e5f63c65d6f392,

title = "Modelling and characterization of cell collapse in aluminium foams during dynamic loading",

abstract = "Plate-impact experiments have been conducted to investigate the elastic-plastic behaviour of shock wave propagation and pore collapse mechanisms of closed-cell aluminium foams. FE modelling using a meso-scale approach has been carried out with the FE software ABAQUS/Explicit. A micro-computed tomography-based foam geometry has been developed and microstructural changes with time have been investigated to explore the effects of wave propagation. Special attention has been given to the pore collapse mechanism. The effect of velocity variations on deformation has been elucidated with three different impact conditions using the plate-impact method. Free surface velocity (ufs) was measured on the rear of the sample to understand the evolution of the compaction. At low impact velocities, the free-surface velocity increased gradually, whereas an abrupt rise of free-surface velocity was found at an impact velocity of 845 m/s with a copper flyer-plate which correlates with the appearance of shock. A good correlation was found between experimental results and FE predictions.",

keywords = "Closed-cell aluminium foam, Meso-scale modelling, Micro-computed tomography, Plastic collapse, Shock propagation",

author = "Kader, {M. A.} and Islam, {M. A.} and Hazell, {P. J.} and Escobedo, {J. P.} and M. Saadatfar and Brown, {A. D.} and Appleby-Thomas, {G. J.}",

year = "2016",

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doi = "10.1016/j.ijimpeng.2016.05.020",

language = "English",

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journal = "International Journal of Impact Engineering",

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AU - Kader, M. A.

AU - Islam, M. A.

AU - Hazell, P. J.

AU - Escobedo, J. P.

AU - Saadatfar, M.

AU - Brown, A. D.

AU - Appleby-Thomas, G. J.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Plate-impact experiments have been conducted to investigate the elastic-plastic behaviour of shock wave propagation and pore collapse mechanisms of closed-cell aluminium foams. FE modelling using a meso-scale approach has been carried out with the FE software ABAQUS/Explicit. A micro-computed tomography-based foam geometry has been developed and microstructural changes with time have been investigated to explore the effects of wave propagation. Special attention has been given to the pore collapse mechanism. The effect of velocity variations on deformation has been elucidated with three different impact conditions using the plate-impact method. Free surface velocity (ufs) was measured on the rear of the sample to understand the evolution of the compaction. At low impact velocities, the free-surface velocity increased gradually, whereas an abrupt rise of free-surface velocity was found at an impact velocity of 845 m/s with a copper flyer-plate which correlates with the appearance of shock. A good correlation was found between experimental results and FE predictions.

AB - Plate-impact experiments have been conducted to investigate the elastic-plastic behaviour of shock wave propagation and pore collapse mechanisms of closed-cell aluminium foams. FE modelling using a meso-scale approach has been carried out with the FE software ABAQUS/Explicit. A micro-computed tomography-based foam geometry has been developed and microstructural changes with time have been investigated to explore the effects of wave propagation. Special attention has been given to the pore collapse mechanism. The effect of velocity variations on deformation has been elucidated with three different impact conditions using the plate-impact method. Free surface velocity (ufs) was measured on the rear of the sample to understand the evolution of the compaction. At low impact velocities, the free-surface velocity increased gradually, whereas an abrupt rise of free-surface velocity was found at an impact velocity of 845 m/s with a copper flyer-plate which correlates with the appearance of shock. A good correlation was found between experimental results and FE predictions.

KW - Closed-cell aluminium foam

KW - Meso-scale modelling

KW - Micro-computed tomography

KW - Plastic collapse

KW - Shock propagation

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U2 - 10.1016/j.ijimpeng.2016.05.020

DO - 10.1016/j.ijimpeng.2016.05.020

M3 - Article

SN - 0734-743X

VL - 96

SP - 78

EP - 88

JO - International Journal of Impact Engineering

JF - International Journal of Impact Engineering

ER -

Modelling and characterization of cell collapse in aluminium foams during dynamic loading

Abstract

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