Design and strengthening mechanisms in hierarchical architected materials processed using additive manufacturing

Natural structural materials which feature hierarchical architectures, like bone and glass sponge skeletons, often display remarkable mechanical properties. Employing the principle of hierarchy can create self-similar architected metamaterials across multiple length-scales, but the strengthening mechanisms remain to be fully understood. In the present study, self-similar hierarchical octet-truss lattice materials were fabricated via additive...