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Composite 3D-printed metastructures for low-frequency and broadband vibration absorption

Matlack, Kathryn H. and Bauhofer, Anton and Krödel, Sebastian and Palermo, Antonio and Daraio, Chiara (2016) Composite 3D-printed metastructures for low-frequency and broadband vibration absorption. Proceedings of the National Academy of Sciences of the United States of America, 113 (30). pp. 8386-8390. ISSN 0027-8424. PMCID PMC4968765. doi:10.1073/pnas.1600171113.

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Architected material used to control elastic wave propagation has thus far relied on two mechanisms for forming band gaps, or frequency ranges that cannot propagate: (i) Phononic crystals rely on their structural periodicity to form Bragg band gaps, but are limited in the low-frequency ranges because their unit cell size scales with wavelength; and (ii) Metamaterials overcome this size dependence because they rely on local resonances, but the resulting band gaps are very narrow. Here, we introduce a class of materials, elastic metastructures, that exploit resonating elements to broaden and lower Bragg gaps while reducing the mass of the system. This approach to band-gap engineering can be used for low-frequency vibration absorption and wave guiding across length scales.

Item Type:Article
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URLURL TypeDescription CentralArticle Information Paper
Matlack, Kathryn H.0000-0001-7387-2414
Krödel, Sebastian0000-0002-9218-8578
Palermo, Antonio0000-0001-9431-0461
Daraio, Chiara0000-0001-5296-4440
Alternate Title:Composite 3D-printed meta-structures for low frequency and broadband vibration absorption
Additional Information:© 2016 National Academy of Sciences. Edited by Zhigang Suo, Harvard University, Cambridge, MA, and accepted by Editorial Board Member John A. Rogers June 6, 2016 (received for review January 6, 2016) The authors acknowledge Shi En Kim for performing the measurements of the 3D-printed material properties. This work was partially supported by the ETH Postdoctoral Fellowship to K.H.M., and partially supported by the Swiss National Science Foundation Grant 164375. Author contributions: K.H.M., A.B., and C.D. designed research; K.H.M., A.B., S.K., and A.P. performed research; K.H.M., A.B., A.P., and C.D. analyzed data; and K.H.M. and C.D. wrote the paper. The authors declare no conflict of interest. This article is a PNAS Direct Submission. Z.S. is a guest editor invited by the Editorial Board. This article contains supporting information online at
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)164375
Subject Keywords:metamaterials, phononic crystals, band gaps, 3D printing, vibration isolation
Issue or Number:30
PubMed Central ID:PMC4968765
Record Number:CaltechAUTHORS:20160316-135044479
Persistent URL:
Official Citation:Kathryn H. Matlack, Anton Bauhofer, Sebastian Krödel, Antonio Palermo, and Chiara Daraio Composite 3D-printed metastructures for low-frequency and broadband vibration absorption PNAS 2016 113 (30) 8386-8390; published ahead of print July 7, 2016, doi:10.1073/pnas.1600171113
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65397
Deposited By: Tony Diaz
Deposited On:16 Mar 2016 20:55
Last Modified:10 Nov 2021 23:45

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