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Scalable phononic metamaterials: Tunable bandgap design and multi-scale experimental validation

Journal Article · · Materials & Design
 [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4];  [5];  [6];  [1];  [7];  [5];  [1]
  1. University of California, Berkeley, CA (United States)
  2. Foundation for Research & Technology-Hellas, Heraklion (Greece); University of Crete, Heraklion (Greece)
  3. Foundation for Research & Technology-Hellas, Heraklion (Greece); National and Kapodistrian University of Athens (Greece)
  4. Istanbul Technical University (Turkey)
  5. Foundation for Research & Technology-Hellas, Heraklion (Greece)
  6. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  7. University of California, Berkeley, CA (United States); Ulsan National Institute of Science and Technology (UNIST), Ulsan (Korea, Republic of)
Phononic metamaterials offer unprecedented control over wave propagation, making them essential for applications such as vibration isolation, waveguiding, and acoustic filtering. However, achieving scalable and precisely tunable bandgap properties across different length scales remains challenging. This study presents a user-friendly design framework for phononic metamaterials, enabling ultra-wide bandgap tunability (B/ωc ratios up to 172 %) across multiple frequency ranges and scales. Using finite element simulations of a Yablonovite-inspired unit cell, we establish a comprehensive parametric design space that illustrates how geometric parameters, such as sphere size and beam diameter, controls bandgap width and frequency. The scalability and robustness of the framework are validated through experimental testing on additively manufactured structures at both macro (10 mm) and micro (80 µm) scales, fabricated using Stereolithography and Two-Photon Polymerization. Transmission loss measurements, conducted with piezoelectric transducers and laser vibrometry, closely match simulations in the kHz and MHz frequency ranges, confirming the reliability and consistency of the bandgap behavior across scales. This work bridges theory and experiments at multiple scales, offering a practical methodology for the rapid design of phononic metamaterials and expanding their potential for diverse applications across a broad range of frequencies.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
Marie Skłodowska-Curie Actions (MSCA); National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
2563342
Report Number(s):
LLNL--JRNL-872305; 1110310
Journal Information:
Materials & Design, Journal Name: Materials & Design Vol. 252; ISSN 0264-1275
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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