File:S41467-020-15434-2.pdf
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DescriptionS41467-020-15434-2.pdf |
English: Though beam-based lattices have dominated mechanical metamaterials for the past two decades, low structural efficiency limits their performance to fractions of the Hashin-Shtrikman and Suquet upper bounds, i.e. the theoretical stiffness and strength limits of any isotropic cellular topology, respectively. While plate-based designs are predicted to reach the upper bounds, experimental verification has remained elusive due to significant manufacturing challenges. Here, we present a new class of nanolattices, constructed from closed-cell plate-architectures. Carbon plate-nanolattices are fabricated via two-photon lithography and pyrolysis and shown to reach the Hashin-Shtrikman and Suquet upper bounds, via in situ mechanical compression, nano-computed tomography and micro-Raman spectroscopy. Demonstrating specific strengths surpassing those of bulk diamond and average performance improvements up to 639% over the best beam-nanolattices, this study provides detailed experimental evidence of plate architectures as a superior mechanical metamaterial topology. |
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https://www.nature.com/articles/s41467-020-15434-2 https://doi.org/10.1038/s41467-020-15434-2 |
Author | Cameron Crook, Jens Bauer, Anna Guell Izard, Cristine Santos de Oliveira, Juliana Martins de Souza e Silva, Jonathan B. Berger & Lorenzo Valdevit |
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current | 13:15, 21 April 2020 | 1,239 × 1,629, 11 pages (2.03 MB) | Pamputt (talk | contribs) | Uploaded a work by Cameron Crook, Jens Bauer, Anna Guell Izard, Cristine Santos de Oliveira, Juliana Martins de Souza e Silva, Jonathan B. Berger & Lorenzo Valdevit from https://www.nature.com/articles/s41467-020-15434-2 https://doi.org/10.1038/s41467-020-15434-2 with UploadWizard |
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Short title | Plate-nanolattices at the theoretical limit of stiffness and strength |
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Image title | Nature Communications, doi:10.1038/s41467-020-15434-2 |
Author | Cameron Crook |
Software used | Springer |
Conversion program | iText® 5.3.5 ©2000-2012 1T3XT BVBA (SPRINGER SBM; licensed version) |
Encrypted | no |
Page size | 595.276 x 782.362 pts |
Version of PDF format | 1.4 |
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