<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Passive control of wave propagation in periodic anti-tetrachiral meta-materials"^^ . "Periodic anti-tetrachiral materials are strongly characterized by a marked auxeticity,\r\nthe unusual and fascinating mechanical property mathematically expressed by negative values\r\nof the Poisson’s ratio. The auxetic behavior is primarily provided by pervasive rolling-up mechanisms\r\ndeveloped by the doubly-symmetric micro-structure of the periodic cell, composed by a\r\nregular pattern of rigid rings connected by tangent flexible ligaments. Adopting a beam-lattice\r\nmodel to describe the linear free dynamics of the elementary cell, the planar wave propagation\r\nalong the bi-dimensional material domain can be studied according to the Floquet-Bloch\r\ntheory. Parametric analyses of the dispersion curves, carried out with numerical or asymptotic\r\ntools, typically reveal a highly-dense spectrum, with persistent absence of total band-gaps in the\r\nlow-frequency range. The paper analyses the wave propagation in the meta-material developed\r\nby introducing rigid massive inserts, locally housed by all the rings and working as undamped\r\nlinear oscillators with assigned inertia and/or stiffness properties. The elastic coupling between\r\nthe cell microstructure and the oscillators, if properly tuned (inertial resonators), is found to\r\nsignificantly modify the Floquet-Bloch spectrum of the material. The effects of the resonator\r\nparameters (tuning frequency and mass ratio) on the low-frequency band structure of the metamaterial\r\nare discussed, with focus on the valuable possibility to (i) open total band gaps, by\r\neither the widening of an existing partial band gap or the avoidance of a crossing point between\r\nadjacent dispersion curves, (ii) finely control the total band-gap amplification, in order to assess\r\nthe maximum achievable performance of the meta-material against the vibration propagation"^^ . "2016" . . "ECCOMAS"^^ . . . . . . . . . . . "Marco"^^ . "Lepidi"^^ . "Marco Lepidi"^^ . . "Andrea"^^ . "Bacigalupo"^^ . "Andrea Bacigalupo"^^ . . . . "VII European Congress on Computational Methods in Applied Sciences and Engineering - ECOMAS 2016"^^ . . . . . "Crete, Greece"^^ . . . . . "HTML Summary of #3789 \n\nPassive control of wave propagation in periodic anti-tetrachiral meta-materials\n\n" . "text/html" . . . "T Technology (General)"@en . . . "TA Engineering (General). Civil engineering (General)"@en . .