TY - JOUR
T1 - Designing 3D Digital Metamaterial for Elastic Waves
T2 - From Elastic Wave Polarizer to Vibration Control
AU - Liu, Huan
AU - Zhang, Quan
AU - Zhang, Kai
AU - Hu, Gengkai
AU - Duan, Huiling
N1 - Publisher Copyright:
© 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/8
Y1 - 2019/8
N2 - Elastic wave polarizers, which can filter out linearly polarized elastic waves from hybrid elastic waves, remain a challenge since elastic waves contain both transverse and longitudinal natures. Here, a tunable, digital, locally resonant metamaterial inspired by abacus is proposed, which consists of 3D-printed octahedral frames and built-in electromagnets. By controlling current in the electromagnets, each unit cell exhibits three digital modes, where the elastic waves have different characteristics of propagation under each mode. A variety of waveguides can be formed by a combination of the three modes and desired polarization can be further filtered out from hybrid elastic waves in a tunable manner. The underlying mechanism of these polarizer-like characteristics is investigated through a combination of theoretical analysis, numerical simulation, and experimental testing. This study provides a means of filtering out the desired wave from hybrid elastic waves, and offers promise for vibration control of particle distribution and flexible structure.
AB - Elastic wave polarizers, which can filter out linearly polarized elastic waves from hybrid elastic waves, remain a challenge since elastic waves contain both transverse and longitudinal natures. Here, a tunable, digital, locally resonant metamaterial inspired by abacus is proposed, which consists of 3D-printed octahedral frames and built-in electromagnets. By controlling current in the electromagnets, each unit cell exhibits three digital modes, where the elastic waves have different characteristics of propagation under each mode. A variety of waveguides can be formed by a combination of the three modes and desired polarization can be further filtered out from hybrid elastic waves in a tunable manner. The underlying mechanism of these polarizer-like characteristics is investigated through a combination of theoretical analysis, numerical simulation, and experimental testing. This study provides a means of filtering out the desired wave from hybrid elastic waves, and offers promise for vibration control of particle distribution and flexible structure.
KW - 3D digital metamaterials
KW - elastic wave polarizers
KW - local resonances
KW - tunable
KW - vibration control
UR - http://www.scopus.com/inward/record.url?scp=85067363334&partnerID=8YFLogxK
U2 - 10.1002/advs.201900401
DO - 10.1002/advs.201900401
M3 - Article
AN - SCOPUS:85067363334
SN - 2198-3844
VL - 6
JO - Advanced Science
JF - Advanced Science
IS - 16
M1 - 1900401
ER -