Comment by damoncali

You don't need to be so literal. When you look at honeycomb, for example, the manufacturers provide strength data in much the same way you'd see it for a solid metal. When you model it with finite element software, you treat it as an monolithic material - you don't model every fold of metal. In that sense, honeycomb (and this stuff) is a material in that it's used the same way. The properties of the "material" already account for its micro-structure.