  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.
