Fig. 1
From: Determining Cosserat constants of 2D cellular solids from beam models
Microstructure for small irregularity (β=0.05), system height H=7Δp; boundary conditions are applied at the surface nodes marked in red while the left and right boundaries are free; note that a small shift of the structure to the left would open the cells at the left boundary and considerably reduce the stiffness of the structure under the imposed loading