Honeycomb structures are periodic.

The cell structure is uniform and perfect; cell walls have uniform thickness (except for expanded honeycombs, where cell walls in the ribbon direction have double thickness), and all cells are the same size.

Honeycomb structures are made of one orthotropic linear-elastic material. The material 1 direction is aligned with the cell edges, the material 2 direction is aligned with the global Z direction, and the material 3 direction corresponds to the normal to the cell walls.

In case of expanded honeycombs, bonding between cells is perfect. In addition, the adhesive material used to bond the sheets and the resin possibly used for coating are not modeled.