Effect of cell-size on the energy absorption features of closed-cell aluminium foams
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Anglia Ruskin University; University of ChesterPublication Date
2016-07-02
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The effect of cell-size on the compressive response and energy absorption features of closed-cell aluminium (Al) foam were investigated by finite element method. Micromechanical models were constructed with a repeating unit-cell (RUC) which was sectioned from tetrakaidecahedra structure. Using this RUC, three Al foam models with different cell-sizes (large, medium and small) and all of same density, were built. These three different cell-size pieces of foam occupy the same volume and their domains contained 8, 27 and 64 RUCs respectively. However, the smaller cell-size foam has larger surface area to volume ratio compared to other two. Mechanical behaviour was modelled under uniaxial loading. All three aggregates (3D arrays of RUCs) of different cell-sizes showed an elastic region at the initial stage, then followed by a plateau, and finally, a densification region. The smaller cell size foam exhibited a higher peak-stress and a greater densification strain comparing other two cell-sizes investigated. It was demonstrated that energy absorption capabilities of smaller cell-size foams was higher compared to the larger cell-sizes examined.Citation
Nammi, S. K., Edwards, G., & Shirvani, H. (2016). Effect of cell-size on the energy absorption features of closed-cell aluminium foams. Acta Astronautica, 128, 243-50.Publisher
ElsevierJournal
Acta AstronauticaAdditional Links
http://www.sciencedirect.com/science/article/pii/S0094576516304131Type
ArticleLanguage
enISSN
0094-5765ae974a485f413a2113503eed53cd6c53
10.1016/j.actaastro.2016.06.047
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Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc-nd/4.0/