Bandgap tuning in kerfed metastrips under extreme deformation

Caleb Widstrand; Negar Kalantar; Stefano Gonella

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arXiv · 2110.05654

Bandgap tuning in kerfed metastrips under extreme deformation

Caleb Widstrand·Negar Kalantar·Stefano Gonella

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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 powerful bandgap tuning mechanism.

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Caleb Widstrand, Negar Kalantar, Stefano Gonella. 2021-10-12. Bandgap tuning in kerfed metastrips under extreme deformation. https://arxiv.org/abs/2110.05654

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