Bandgap tuning in kerfed metastrips under extreme deformation

Caleb Widstrand, Negar Kalantar, Stefano Gonella

Research output: Contribution to journalArticlepeer-review

Abstract

The process of kerfing enables planar structures with the ability to undergo dramatic out-of-plane deformation in response to static loads. Starting from flat and stiff sheets, kerfing allows for the formation of a wide variety of unconventional free-form shapes, making the process especially attractive for architectural applications. In this work, we investigate numerically and experimentally the bandgap behavior of densely cut kerfed strips. Our study reveals a rich landscape of bandgaps that is predominantly ascribable to the activation of resonant sub-units within the kerf unit cells. We also document how the extreme deformability of the strips under twisting and bending loads, enhanced by the meandering cut pattern, can serve as a bandgap tuning mechanism.

Original languageEnglish (US)
Article number101693
JournalExtreme Mechanics Letters
Volume53
DOIs
StatePublished - May 2022

Bibliographical note

Funding Information:
The authors acknowledge support from the National Science Foundation, USA (EAGER grant CMMI - 1911678 ). N.G. also acknowledges partial support from National Science Foundation, USA grant CMMI - 1913688 . We are grateful to A. Muliana at Texas A&M for useful discussions.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Bandgaps
  • Extreme deformation
  • Kerfing
  • Metamaterials
  • Tunability

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