Titre :

Propagation and attenuation of Rayleigh and pseudo surface waves in viscoelastic metamaterials

Auteur(s) :

Cai, R. [Auteur]
Jin, Y. [Auteur]
Rabczuk, T. [Auteur]
Zhuang, X. [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]

Titre de la revue :

Journal of Applied Physics

Pagination :

0003923

Éditeur :

American Institute of Physics

Date de publication :

2021-03-28

ISSN :

0021-8979

Mot(s)-clé(s) en anglais :

Band structure
Seismology
Surface waves
Viscoelasticity
Complex band structures
Elastic surfaces
Propagation properties
Research interests
Soft coating
Theoretical approach
Transmission spectrums
Viscoelastic effects
Metamaterials

Discipline(s) HAL :

Physique [physics]

Résumé en anglais : [en]

The development of seismic metamaterials has attracted much research interest in the past decade. Efforts have been made by using experimental and theoretical approaches to isolate buildings and structures susceptible to ...
Lire la suite >The development of seismic metamaterials has attracted much research interest in the past decade. Efforts have been made by using experimental and theoretical approaches to isolate buildings and structures susceptible to elastic surface wave damage. However, most seismic metamaterials were designed without considering the viscoelastic effect that widely exists in nature. In this work, we investigate the propagation and attenuation of the Rayleigh and pseudo surface waves (PSWs) in two types of viscoelastic seismic metamaterials, namely, pillared and inclusion-embedded metamaterials, by analyzing the complex band structures and transmission spectra. The complex band structure developed in this work reveals for the first time the existence of PSWs and their propagation properties in inclusion-embedded metamaterials at the surface. These PSW modes are hidden in the traditional ω(k) technique, therefore showing the usefulness of the complex band structure approach. Introducing viscosity to the substrate of both types of seismic metamaterials will enhance the attenuation of both the Rayleigh wave and PSW. For inclusion-embedded metamaterials, the viscoelastic effect in the soft coating layer can have a specific influence only on the PSW. PSWs show advantages to minimize the relative attenuating effect in general. The results in this work will open up great possibilities for designing and optimizing seismic metamaterials in practice.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL