Architected frames for elastic wave attenuation: Experimental validation and local tuning via affine transformation
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2022-11-14
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Journal Article
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Abstract
We experimentally demonstrate the capability of architected plates, with a frame-like cellular structure, to inhibit the propagation of elastic
flexural waves. By leveraging the octet topology as a unit cell to design the tested prototypes, a broad and easy-to-tune bandgap is experimen tally generated. The experimental outcomes are supported by extensive numerical analyses based on 3D solid elements. Drawing from the
underlying dynamic properties of the octet cell, we numerically propose a tailorable design with enhanced filtering capabilities. We transform
the geometry of the original unit cell by applying a uniaxial scaling factor that, by breaking the in-plane symmetry of the structure, yields
independently tuned struts and consequently multiple tunable bandgaps within the same cell. Our findings expand the spectrum of available
numerical analyses on the octet lattice, taking it a significant step closer to its physical implementation. The ability of the octet lattice to con trol the propagation of flexural vibrations is significant within various applications in the mechanical and civil engineering domains, and we
note such frame-like designs could lead to advancements in energy harvesting and vibration protection devices (e.g., lightweight and
resonance-tunable absorbers).
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121 (20)
Pages / Article No.
201702
Publisher
American Institute of Physics
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Organisational unit
03890 - Chatzi, Eleni / Chatzi, Eleni
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Funding
174009 - Structured materials for multiscale wave control (SNF)
863179 - Bio-Inspired Hierarchical MetaMaterials (EC)
952039 - Metamaterial Enabled Vibration Energy Harvesting (EC)
863179 - Bio-Inspired Hierarchical MetaMaterials (EC)
952039 - Metamaterial Enabled Vibration Energy Harvesting (EC)