to define the structures of particular note the invention provides technologies and structures having a dovetail geometry at the edges of the tablets structures having progressive locking mechanism hardening and spreading of deformation a three dimensional staggered arrangement of the composite inclusions or tablets and design guidelines to achieve this composite the behavior of the microstructure of the composite can be represented by a periodic symmetric representative volume element rve showed on fig6 only uniaxial tension is considered on the rve and therefore the average shear strain on the rve was set to zero the periodic boundary conditions on the rve are then written u03bc x lo lc z u03bc x u2212 lo lc z 2 lo lc u00b7 u03b5 x u2200 z u03b5 u2212 t t 1 u03bc z x t u03bc z x u2212 t 2 t u00b7 u03b5 z u2200 x u03b5 u2212 lo lc lo lc 2 where u03b5 x and u03b5 z are the average strains over the rve in addition the rve is symmetric about the x 0 and z 0 axes so that only a quarter of the rve needs to be modeled fig6 a and 6b the displacement must also satisfy symmetry combining 1 and 3 yields the periodic symmetric condition on the reduced rve the rve is stretched along the direction of the tablets this is easily achieved by imposing a uniform displacement on the right hand side boundary.