Abstract
Materials with a cellular structure are widespread; they include natural materials such as wood and cork as well as man-made honeycombs and foams. Their cellular structure gives rise to unique properties which can be exploited in engineering design. The selection of a specific honeycomb or foam for a particular engineering application is guided by models which describe their mechanical behavior in terms of the cell geometry and the mechanisms of deformation and failure. In this review, models for the mechanical behavior of cellular materials are first described and then used to select the optimum foam for two engineering applications, the design of packaging and of light-weight structural sandwich panels.
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