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

Pajunen, Kirsti and Celli, Paolo and Daraio, Chiara (2021) Prestrain-induced bandgap tuning in 3D-printed tensegrity-inspired lattice structures. Extreme Mechanics Letters, 44 . Art. No. 101236. ISSN 2352-4316. https://resolver.caltech.edu/CaltechAUTHORS:20210106-102302065

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Abstract

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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.eml.2021.101236DOIArticle
https://arxiv.org/abs/2011.00167arXivDiscussion Paper
ORCID:
AuthorORCID
Pajunen, Kirsti0000-0002-5366-1190
Celli, Paolo0000-0001-7839-7472
Daraio, Chiara0000-0001-5296-4440
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.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) Fellowship32 CFR 168a
Subject Keywords:Tensegrity lattices; Phononics; Architected solids; Prestrain; Tunability; Dispersion reconstruction
Record Number:CaltechAUTHORS:20210106-102302065
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210106-102302065
Official Citation:Kirsti Pajunen, Paolo Celli, Chiara Daraio, Prestrain-induced bandgap tuning in 3D-printed tensegrity-inspired lattice structures, Extreme Mechanics Letters, Volume 44, 2021, 101236, ISSN 2352-4316, https://doi.org/10.1016/j.eml.2021.101236. (https://www.sciencedirect.com/science/article/pii/S2352431621000390)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107335
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:06 Jan 2021 20:07
Last Modified:12 Mar 2021 18:04

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