On the elastodynamic properties of octet truss-based architected metamaterials

Architected metamaterials have emerged as a central topic in materials science and mechanics, thanks to the rapid development of additive manufacturing techniques, which have enabled artificial materials with outstanding mechanical properties. This Letter seeks to investigate the elastodynamic behavior of octet truss lattices as an important type of architected metamaterials for high effective strength and vibration shielding. We design, fabricate, and experimentally characterize three types of octet truss structures, including two homogenous structures with either thin or thick struts and one hybrid structure with alternating strut thickness. High elastic wave transmission rate is observed for the lattice with thick struts, while strong vibration mitigation is captured from the homogenous octet truss structure with thin struts as well as the hybrid octet truss lattice, though the underlying mechanisms for attenuation are fundamentally different (viscoelasticity induced dampening vs bandgaps). Compressional tests are also conducted to evaluate the effective stiffness of the three lattices. This study could open an avenue toward multifunctional architected metamaterials for vibration shielding with high mechanical strength.

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in [On the elastodynamic properties of octet truss-based architected metamaterials. Applied Physics Letters 122, 17 (2023)] and may be found at https://doi.org/10.1063/5.0140673.

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Work Title On the elastodynamic properties of octet truss-based architected metamaterials
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Open Access
Creators
  1. M Oudich
  2. Edward Huang
  3. Hyeonu Heo
  4. Zhenpeng Xu
  5. Huachen Cui
  6. Nikhil JRK Gerard
  7. Xiaoyu (Rayne) Zheng
  8. Yun Jing
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Applied Physics Letters
Publication Date April 24, 2023
Publisher Identifier (DOI)
  1. https://doi.org/10.1063/5.0140673
Deposited December 14, 2024

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  • Added Creator Hyeonu Heo
  • Added Creator Zhenpeng Xu
  • Added Creator Huachen Cui
  • Added Creator Nikhil JRK Gerard
  • Added Creator Xiaoyu (Rayne) Zheng
  • Added Creator Yun Jing
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