Locally resonant metamaterials utilizing dynamic directional amplification: An application for seismic mitigation

Kalderon, Moris; Mantakas, Antonios; Paradeisiotis, Andreas; Antoniadis, Ioannis; Sapountzakis, E. J.

doi:10.1016/j.apm.2022.05.037

Cited by 18 publications

(3 citation statements)

References 47 publications

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“…In recent years, a plethora of designs was proposed to realize locally resonant elastic waveguides, including beams and plates coupled with periodic arrays of small resonators . Remarkable properties were also found in locally resonant lattice metamaterials [149,150]. For instance, the study in Bigoni et al [149] introduced a lattice metamaterial structure endowed with inertial resonators, each consisting of an inclusion coated by a structural interface made of beams inclined at given angle; as a result, the lattice metamaterial exhibits tunable low-frequency stop bands, associated with localized rotational modes, to be used in the design of filtering, reflecting and focusing devices.…”

Section: Engineering Applicationsmentioning

confidence: 99%

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Current developments in elastic and acoustic metamaterials science

Failla,

Marzani,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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The concept of metamaterial recently emerged as a new frontier of scientific research, encompassing physics, materials science and engineering. In a broad sense, a metamaterial indicates an engineered material with exotic properties not found in nature, obtained by appropriate architecture either at macro-scale or at micro-/nano-scales. The architecture of metamaterials can be tailored to open unforeseen opportunities for mechanical and acoustic applications, as demonstrated by an impressive and increasing number of studies. Building on this knowledge, this theme issue aims to gather cutting-edge theoretical, computational and experimental studies on elastic and acoustic metamaterials, with the purpose of offering a wide perspective on recent achievements and future challenges. This article is part of the theme issue ‘Current developments in elastic and acoustic metamaterials science (Part 1)’.

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Section: Engineering Applicationsmentioning

confidence: 99%

Section: Engineering Applicationsmentioning

confidence: 99%

Current developments in elastic and acoustic metamaterials science

Failla,

Marzani,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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“…In this paper, inspired by the benefits induced by the insertion of DDA mechanisms within the structure [18][19][20][21], one-dimensional inertial amplified lattices are designed for the mitigation of low-frequency mechanical vibrations. To this end, a DDA-enhanced phononic metamaterial chain is constructed and tested, consisting of LEGO® Technic bricks.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Phononic Structures With Dda Enhanced Unit-Cells

Kalderon,

Mantakas,

Chondrogiannis

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Phononic structures with periodic unit-cells that exhibit Bragg scattering, have been investigated during the latest years by various researchers due to their extraordinary wave manipulation and filtering properties. One major feature of these metamaterials is their ability to generate stopbands or bandgaps in the frequency domain, hence presenting significant vibration attenuation properties. However, this mechanism presents certain design constraints in generating broadband bandgaps, especially in the low-frequency range, where large masses are required. To this end, a novel dynamic directional amplifier, namely the DDA, is introduced as a means to artificially increase the inertia of an oscillating mass. The DDA is realized by imposing kinematic constraints to the degrees of freedom (DoFs) of the oscillator, hence inertia is increased by coupling the horizontal and vertical motion. In this study, the DDA is implemented in an experimental scaled phononic set-up that is constructed using LEGO® Technic components. Experimental testing is undertaken as a feasibility assessment of the concept and results indicate the low-frequency wave attenuation properties of the structure.

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