Print Email Facebook Twitter Origami lattices with free-form surface ornaments Title Origami lattices with free-form surface ornaments Author Janbaz, S. (TU Delft Biomaterials & Tissue Biomechanics) Noordzij, N. (TU Delft ImPhys/Charged Particle Optics) Widyaratih, Dwisetya Safirna (Student TU Delft) Hagen, C.W. (TU Delft ImPhys/Charged Particle Optics) Fratila-Apachitei, E.L. (TU Delft Biomaterials & Tissue Biomechanics) Zadpoor, A.A. (TU Delft Biomaterials & Tissue Biomechanics) Date 2017 Abstract Lattice structures are used in the design of metamaterials to achieve unusual physical, mechanical, or biological properties. The properties of such metamaterials result from the topology of the lattice structures, which are usually three-dimensionally (3D) printed. To incorporate advanced functionalities into metamaterials, the surface of the lattice structures may need to be ornamented with functionality-inducing features, such as nanopatterns or electronic devices. Given our limited access to the internal surfaces of lattice structures, free-form ornamentation is currently impossible. We present lattice structures that are folded from initially flat states and show that they could bear arbitrarily complex surface ornaments at different scales. We identify three categories of space-filling polyhedra as the basic unit cells of the cellular structures and, for each of those, propose a folding pattern. We also demonstrate “sequential self-folding” of flat constructs to 3D lattices. Furthermore, we folded auxetic mechanical metamaterials from flat sheets and measured the deformation-driven change in their negative Poisson’s ratio. Finally, we show how free-form 3D ornaments could be applied on the surface of flat sheets with nanometer resolution. Together, these folding patterns and experimental techniques present a unique platform for the fabrication of metamaterials with unprecedented combination of physical properties and surface-driven functionalities Subject OA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:8aa27118-890a-4436-9c65-0bb945614bdb DOI https://doi.org/10.1126/sciadv.aao1595 ISSN 2375-2548 Source Science Advances, 3 (11) Part of collection Institutional Repository Document type journal article Rights © 2017 S. Janbaz, N. Noordzij, Dwisetya Safirna Widyaratih, C.W. Hagen, E.L. Fratila-Apachitei, A.A. Zadpoor Files PDF eaao1595.full.pdf 1.6 MB Close viewer /islandora/object/uuid:8aa27118-890a-4436-9c65-0bb945614bdb/datastream/OBJ/view