Mechanics of cellular and other low-density materials

This is the authors' abstract. We don't add key points for this paper.

Both two-dimensional and three-dimensional low density materials are surveyed. The microstructure is usually in a cellular form with some characteristic dimension(s) being small compared to the cell size and with the density range approaching that at which the loss of material integrity occurs. The mechanical properties of stiffness and strength are considered, along with applications and future opportunities.