Print Email Facebook Twitter 2D lattice material architectures for actuation Title 2D lattice material architectures for actuation Author Nelissen, W.E.D. (Student TU Delft) Ayas, C. (TU Delft Computational Design and Mechanics) Tekõglu, C. (TOBB University of Economics and Technology) Date 2019 Abstract The Kagome structure has been shown to be a highly suited micro-architecture for adaptive lattice materials, in which selected lattice members are replaced by actuators aiming to create shape morphing structures. It is the combination of in-plane isotropy, high stiffness and low energy requirement for actuation that makes the planar Kagome structure the best performing micro-architecture known to date. Recently, Pronk et al. (2017) have proposed a set of topological criteria to identify other micro-architectures suitable for actuation. In the present paper, four novel lattice topologies are presented which were contrived in light of these criteria. Matrix analysis is performed to reveal the static and kinematic properties of the pin-jointed versions of these four structures. The finite element method is used to determine their stiffness and actuation characteristics. One of the proposed designs is found to match the optimal elastic properties of the Kagome structure, while it requires less energy for (single member) actuation. However, the displacement field induced by actuation attenuates faster than in a Kagome lattice. The presented results also show that the criteria proposed by Pronk et al. (2017) should be refined in two regards: (i) statically indeterminate lattice materials do not necessarily result in high actuation energy and thus should not be ruled out, and (ii) as shown by counterexample, the criteria are not sufficient. Subject ActuatorsCellular solidsFinite element methodLattice materialsShape morphingStatic/kinematic determinacy To reference this document use: http://resolver.tudelft.nl/uuid:816fe6d7-6659-4204-b6cc-4512f470223e DOI https://doi.org/10.1016/j.jmps.2018.09.035 Embargo date 2020-10-14 ISSN 0022-5096 Source Journal of the Mechanics and Physics of Solids, 124, 83-101 Part of collection Institutional Repository Document type journal article Rights © 2019 W.E.D. Nelissen, C. Ayas, C. Tekõglu Files PDF paper.pdf 12.67 MB Close viewer /islandora/object/uuid:816fe6d7-6659-4204-b6cc-4512f470223e/datastream/OBJ/view