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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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Tunable photo-responsive elastic metamaterials.

Antonio S Gliozzi1, Marco Miniaci2,3, Annalisa Chiappone4

  • 1Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy. antonio.gliozzi@polito.it.

Nature Communications
|May 24, 2020
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Summary
This summary is machine-generated.

This study presents a novel 3D-printed elastic metamaterial tunable by light. Researchers demonstrated reversible control over its frequency band gap, enabling a light-activated elastic switch.

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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Metamaterials offer advanced control over wave propagation, but fixed frequency responses limit applications.
  • Existing tunable metamaterials often rely on impractical external stimuli.

Purpose of the Study:

  • To develop a novel elastic metamaterial with a light-tunable frequency response.
  • To demonstrate a functional light-responsive elastic switch.

Main Methods:

  • Fabrication of a polymeric 3D-printed elastic metamaterial.
  • Characterization of the material's transmission spectrum.
  • Selective laser illumination to tune the band gap.

Main Results:

  • Demonstrated reversible doubling of the frequency band gap width upon laser illumination.
  • Achieved a functional elastic-switch with a one-minute lag time.
  • The switch operated reliably over one hundred cycles.

Conclusions:

  • Light-responsive elastic metamaterials can be deterministically tuned.
  • This technology offers a practical solution for active elastic wave control devices.