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.
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24 April 2023
Research Article|
April 24 2023
On the elastodynamic properties of octet truss-based architected metamaterials
Special Collection:
Fundamentals and Applications of Metamaterials: Breaking the Limits
Mourad Oudich
;
Mourad Oudich
a)
(Conceptualization, Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Graduate Program in Acoustics, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
2
Université de Lorraine, CNRS, Institut Jean Lamour
, F-54000 Nancy, France
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
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Edward Huang
;
Edward Huang
(Investigation)
3
William G. Enloe Magnet High School
, Raleigh, North Carolina 27610, USA
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Hyeonu Heo
;
Hyeonu Heo
(Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Graduate Program in Acoustics, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
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Zhenpeng Xu
;
Zhenpeng Xu
(Investigation, Methodology, Resources, Writing – review & editing)
4
Department of Civil and Environmental Engineering, University of California
, Los Angeles, California 90095, USA
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Huachen Cui
;
Huachen Cui
(Investigation, Writing – review & editing)
4
Department of Civil and Environmental Engineering, University of California
, Los Angeles, California 90095, USA
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Nikhil JRK Gerard
;
Nikhil JRK Gerard
(Investigation, Methodology, Writing – review & editing)
1
Graduate Program in Acoustics, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
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Xiaoyu (Rayne) Zheng;
Xiaoyu (Rayne) Zheng
a)
(Funding acquisition, Resources, Supervision, Writing – review & editing)
4
Department of Civil and Environmental Engineering, University of California
, Los Angeles, California 90095, USA
5
Department of Materials Science and Engineering, University of California
, Berkeley, California 94720, USA
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
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Yun Jing
Yun Jing
a)
(Conceptualization, Funding acquisition, Methodology, Resources, Supervision, Writing – review & editing)
1
Graduate Program in Acoustics, The Pennsylvania State University
, University Park, Pennsylvania 16802, USA
a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
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a)Authors to whom correspondence should be addressed: [email protected]; [email protected]; and [email protected]
Note: This paper is part of the APL Special Collection on Fundamentals and Applications of Metamaterials: Breaking the Limits.
Appl. Phys. Lett. 122, 171701 (2023)
Article history
Received:
December 29 2022
Accepted:
April 06 2023
Citation
Mourad Oudich, Edward Huang, Hyeonu Heo, Zhenpeng Xu, Huachen Cui, Nikhil JRK Gerard, Xiaoyu (Rayne) Zheng, Yun Jing; On the elastodynamic properties of octet truss-based architected metamaterials. Appl. Phys. Lett. 24 April 2023; 122 (17): 171701. https://doi.org/10.1063/5.0140673
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