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Published April 2021 | Submitted
Journal Article Open

Prestrain-induced bandgap tuning in 3D-printed tensegrity-inspired lattice structures


In this letter, we provide experimental evidence of bandgap tunability with global prestrain in additively-manufactured tensegrity-inspired lattice structures. These lattices are extremely lightweight and designed to exhibit a nonlinear compressive response that mimics that of a tensegrity structure. We fabricate them out of a stiff polymer but, owing to their peculiar design, they are compliant and remain elastic up to high levels of precompression. In turn, unlike tunable metamaterials made of soft polymers, the response of our lattices is not dominated by damping. We perform experiments on a one-dimensional lattice subject to longitudinal wave excitation and varying levels of static longitudinal precompression, and observe continuous tuning of both the wave speed and the location and width of the lowest-frequency bandgap.

Additional Information

© 2021 Published by Elsevier Ltd. Received 30 October 2020, Revised 15 January 2021, Accepted 15 February 2021, Available online 27 February 2021. This research was conducted with Government support under and awarded by the Department of Defense, USA, Air Force Office of Scientific Research, USA, National Defense Science and Engineering Graduate (NDSEG), USA Fellowship, 32 CFR 168a. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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August 22, 2023
October 23, 2023