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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License | In Copyright (Rights Reserved) |
Work Type | Article |
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Publication Date | April 24, 2023 |
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Deposited | December 14, 2024 |
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