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Mechanical and Fracture Mechanical Behaviour of Metallic Foams

In recent years metallic foams have become more and more attractive due to new and improved manufacturing routes, which results in a better foam quality and therefore in improved mechanical properties. Furthermore, designed structures (e.g. hollow spheres structures) open new fields of application for these cellular metals. The major advantages of this new material class are high temperature resistance, none flammability, high stiffness and fracture strength with respect to their density and an adaptation of most of their properties due to a variation of their relative density. For a proper design with these foams or cellular metals their basic mechanical properties and their responses to loads have to be known, as well as their fracture resistance and fatigue properties. The aim of this paper is to take a closer look on the standard static mechanical, fracture mechanical and fatigue behaviour of a closed-cell aluminium foam, which is representative for a wide range of cellular metals.