Mechanical response and dynamic deformation mechanisms of closed-cell aluminium alloy foams under dynamic loading

M. A. Islam; A. D. Brown; P. J. Hazell; M. A. Kader; J. P. Escobedo; M. Saadatfar; S. Xu; D. Ruan; M. Turner

doi:10.1016/j.ijimpeng.2017.12.012

Mechanical response and dynamic deformation mechanisms of closed-cell aluminium alloy foams under dynamic loading

M. A. Islam, A. D. Brown, P. J. Hazell^*, M. A. Kader, J. P. Escobedo, M. Saadatfar, S. Xu, D. Ruan, M. Turner

^*Corresponding author for this work

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

67 Citations (Scopus)

Abstract

The dynamic compressive response of closed-cell (CYMAT™) stabilised aluminium alloy foams (SAF) has been investigated using a modified Split Hopkinson Pressure Bar (SHPB) in conjunction with a high-speed camera. Tests have been carried out on 45 mm diameter and 23 mm thick cylindrical specimens. The elastic-plastic pore collapse mechanism has been investigated using Digital Image Correlation (DIC) and micro-computed X-ray tomography. A stress-strain relationship for individual specimens at different impact velocities has been obtained with the combination of an analytical method and SHPB theory. The large deformation (∼80%) has been measured from eight strain gauges’ data using a wave separation algorithm. The test results exhibited a significant increase in elastic and plastic strength during the pulse loading. The X-ray tomography data of pre-impacted and post-impacted SAF specimens have been extensively analysed to elucidate the internal elastic-plastic pore collapse mechanisms.

Original language	English
Pages (from-to)	111-122
Number of pages	12
Journal	International Journal of Impact Engineering
Volume	114
DOIs	https://doi.org/10.1016/j.ijimpeng.2017.12.012
Publication status	Published - Apr 2018

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title = "Mechanical response and dynamic deformation mechanisms of closed-cell aluminium alloy foams under dynamic loading",

abstract = "The dynamic compressive response of closed-cell (CYMAT{\texttrademark}) stabilised aluminium alloy foams (SAF) has been investigated using a modified Split Hopkinson Pressure Bar (SHPB) in conjunction with a high-speed camera. Tests have been carried out on 45 mm diameter and 23 mm thick cylindrical specimens. The elastic-plastic pore collapse mechanism has been investigated using Digital Image Correlation (DIC) and micro-computed X-ray tomography. A stress-strain relationship for individual specimens at different impact velocities has been obtained with the combination of an analytical method and SHPB theory. The large deformation (∼80%) has been measured from eight strain gauges{\textquoteright} data using a wave separation algorithm. The test results exhibited a significant increase in elastic and plastic strength during the pulse loading. The X-ray tomography data of pre-impacted and post-impacted SAF specimens have been extensively analysed to elucidate the internal elastic-plastic pore collapse mechanisms.",

author = "Islam, {M. A.} and Brown, {A. D.} and Hazell, {P. J.} and Kader, {M. A.} and Escobedo, {J. P.} and M. Saadatfar and S. Xu and D. Ruan and M. Turner",

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year = "2018",

month = apr,

doi = "10.1016/j.ijimpeng.2017.12.012",

language = "English",

volume = "114",

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journal = "International Journal of Impact Engineering",

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T1 - Mechanical response and dynamic deformation mechanisms of closed-cell aluminium alloy foams under dynamic loading

AU - Islam, M. A.

AU - Brown, A. D.

AU - Hazell, P. J.

AU - Kader, M. A.

AU - Escobedo, J. P.

AU - Saadatfar, M.

AU - Xu, S.

AU - Ruan, D.

AU - Turner, M.

PY - 2018/4

Y1 - 2018/4

N2 - The dynamic compressive response of closed-cell (CYMAT™) stabilised aluminium alloy foams (SAF) has been investigated using a modified Split Hopkinson Pressure Bar (SHPB) in conjunction with a high-speed camera. Tests have been carried out on 45 mm diameter and 23 mm thick cylindrical specimens. The elastic-plastic pore collapse mechanism has been investigated using Digital Image Correlation (DIC) and micro-computed X-ray tomography. A stress-strain relationship for individual specimens at different impact velocities has been obtained with the combination of an analytical method and SHPB theory. The large deformation (∼80%) has been measured from eight strain gauges’ data using a wave separation algorithm. The test results exhibited a significant increase in elastic and plastic strength during the pulse loading. The X-ray tomography data of pre-impacted and post-impacted SAF specimens have been extensively analysed to elucidate the internal elastic-plastic pore collapse mechanisms.

AB - The dynamic compressive response of closed-cell (CYMAT™) stabilised aluminium alloy foams (SAF) has been investigated using a modified Split Hopkinson Pressure Bar (SHPB) in conjunction with a high-speed camera. Tests have been carried out on 45 mm diameter and 23 mm thick cylindrical specimens. The elastic-plastic pore collapse mechanism has been investigated using Digital Image Correlation (DIC) and micro-computed X-ray tomography. A stress-strain relationship for individual specimens at different impact velocities has been obtained with the combination of an analytical method and SHPB theory. The large deformation (∼80%) has been measured from eight strain gauges’ data using a wave separation algorithm. The test results exhibited a significant increase in elastic and plastic strength during the pulse loading. The X-ray tomography data of pre-impacted and post-impacted SAF specimens have been extensively analysed to elucidate the internal elastic-plastic pore collapse mechanisms.

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DO - 10.1016/j.ijimpeng.2017.12.012

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SN - 0734-743X

VL - 114

SP - 111

EP - 122

JO - International Journal of Impact Engineering

JF - International Journal of Impact Engineering

ER -

Mechanical response and dynamic deformation mechanisms of closed-cell aluminium alloy foams under dynamic loading

Abstract

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