Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Dynamic behavior of two-dimensional quasiperiodic plates: achieving high-order wave directionality
Submission Author:
Danilo Beli , SP
Co-Authors:
Danilo Beli, Matheus Inguaggiato Nora Rosa, Carlos De Marqui Junior, Massimo Ruzzene
Presenter: Danilo Beli
doi://10.26678/ABCM.COBEM2021.COB2021-2335
Abstract
Quasiperiodic configurations, or shortly quasicrystals, have emerged as a potential candidate for unexplored wave phenomena within the architected materials (phononic crystals and metamaterials) field. Their spatial distribution lacks translational symmetry, but they present a long-range order and are unrestricted in rotational symmetries. In this work, three-dimensional quasiperiodic elastic metamaterial plates are investigated with numerical simulations and experimental observations. The numerical and experimental results show a complex dispersion for the quasiperiodic plates, which is related to their fractal nature. In certain frequencies, this behavior becomes highly anisotropic and high-order wave directionality is observed on the dynamic response. Therefore, this work observes the wave beaming and diffraction in high-order fold symmetries (e.g., 10-fold) and stimulates a variety of applications involving this unusual wave directionality previously reported only in the crystallographic fold symmetries (2-, 4- and 6-fold).
Keywords
wave propagation, wave beaming, elastic metamaterial, quasicrystals
