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An elasto-mechanical unfeelability cloak made of pentamode metamaterials

Author

Listed:
  • T. Bückmann

    (Institute of Applied Physics and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT))

  • M. Thiel

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
    Nanoscribe GmbH, Hermann-von-Helmholtz-Platz 1)

  • M. Kadic

    (Institute of Applied Physics and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT))

  • R. Schittny

    (Institute of Applied Physics and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT))

  • M. Wegener

    (Institute of Applied Physics and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology (KIT)
    Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
    Nanoscribe GmbH, Hermann-von-Helmholtz-Platz 1)

Abstract

Metamaterial-based cloaks make objects different from their surrounding appear just like their surrounding. To date, cloaking has been demonstrated experimentally in many fields of research, including electrodynamics at microwave frequencies, optics, static electric conduction, acoustics, fluid dynamics, thermodynamics and quasi two-dimensional solid mechanics. However, cloaking in the seemingly simple case of three-dimensional solid mechanics is more demanding. Here, inspired by invisible core-shell nanoparticles in optics, we design an approximate elasto-mechanical core-shell ‘unfeelability’ cloak based on pentamode metamaterials. The resulting three-dimensional polymer microstructures with macroscopic overall volume are fabricated by rapid dip-in direct laser writing optical lithography. We quasi-statically deform cloak and control samples in the linear regime and map the displacement fields by autocorrelation-based analysis of recorded movies. The measured and the calculated displacement fields show very good cloaking performance. This means that one can elastically hide objects along these lines.

Suggested Citation

  • T. Bückmann & M. Thiel & M. Kadic & R. Schittny & M. Wegener, 2014. "An elasto-mechanical unfeelability cloak made of pentamode metamaterials," Nature Communications, Nature, vol. 5(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5130
    DOI: 10.1038/ncomms5130
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    Cited by:

    1. Li Zheng & Konstantinos Karapiperis & Siddhant Kumar & Dennis M. Kochmann, 2023. "Unifying the design space and optimizing linear and nonlinear truss metamaterials by generative modeling," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    2. Jeseung Lee & Minwoo “Joshua” Kweun & Woorim Lee & Hong Min Seung & Yoon Young Kim, 2024. "Perfect circular polarization of elastic waves in solid media," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Angkur Jyoti Dipanka Shaikeea, 2023. "Exploration of truss metamaterials with graph based generative modeling," Nature Communications, Nature, vol. 14(1), pages 1-3, December.

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