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Effects of impactor shape on the deformation and energy absorption of closed cell aluminium foams under low velocity impact

Authors: A. D. Brown; Paul J. Hazell; Mohammad Saadatfar; Juan P. Escobedo; M. A. Kader; M. A. Islam; M. A. Islam;

Effects of impactor shape on the deformation and energy absorption of closed cell aluminium foams under low velocity impact

Abstract

The low-velocity impact response of closed-cell aluminium foams using various shaped indenters has been investigated. Impact tests were conducted using an instrumented drop-tower with flat, hemispherical, conical and truncated-conical indenter at impact energies ranging from 46.8 J to 105 J. The effects of variation of indenter shape and impact velocity on mechanical properties and deformation mechanisms of foam have been explicitly investigated. The results show that the mechanical response of closed-cell aluminium foams under low-velocity projectile impact significantly depends on the indenters' nose shape and initial impact energy. The deformation mechanisms of foam for different shaped indenters have been elucidated using reconstructed X-ray micro-computed tomography (XCT) images of the indented specimens. A good correlation between the indenter shape and deformation mechanisms has been observed. The structure-property relations of foams during dynamic indentation have also been explored by analysing the XCT images of the indented specimens. The parameters that influence the energy absorption capacity of the material are also presented.

Keywords

Closed-cell aluminium foam, Collapse mechanisms, Energy absorption, TA401-492, Indentation, Low-velocity impact, Materials of engineering and construction. Mechanics of materials

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
36
Top 10%
Top 10%
Top 10%
gold
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