Papers
Release Time: 2025-04-30Hits:
- Date:2025-04-30
- Title of Paper:Flexural wave suppression by an elastic metamaterial beam with zero bending stiffness
- Journal:Journal of Applied Physics
- Summary:In this paper, different from Bragg scattering or local resonance mechanisms, a novel mechanism
of an ultra-low-frequency broadband for flexural waves propagating in a one-dimensional elastic
metamaterial beam with zero bending stiffness is proposed, which consists of periodic hinge-linked
blocks. The dispersion relationship of this kind of metamaterial beam is derived and analyzed,
from which we find that these hinge-linked blocks can produce the zero bending stiffness. Thus,
the flexural waves within the metamaterial beam can be suppressed, and an ultra-low-frequency
wide band-gap is formed in which the first branch is generated by the zero bending spring and the
second branch by the negative velocity of the metamaterial beam. Numerical results show that the
elastic metamaterial beams with zero bending stiffness can indeed generate an ultra-low-frequency
wide band gap even starting from almost zero frequency, such as from 0Hz to 525 Hz in our structure.
Therefore, the puzzle of realizing an ultra-low-frequency broadband of flexural waves may
have been better solved, which could be applied in controlling ultra-low-frequency elastic waves in
engineering. - Co-author:Yongyan Zhang, Jiu Hui Wu, Guang Zhong Hu, and Yu Chun Wang
- Volume:Vol.121, No.13, 2017
- Page Number:134902(6 pages)
- Translation or Not:No
- Date of Publication:2017-05-31
