Zero-frequency and slow elastic modes in phononic monolayer granular membranes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ultrasonics Année : 2016

Zero-frequency and slow elastic modes in phononic monolayer granular membranes

(1) , (1) , (1) , (1) , (1)
1

Résumé

We theoretically study the dispersion properties of elastic waves in hexagonal and honeycomb monolayer granular membranes with either out-of-plane or in-plane particle motion. The particles interact predominantly via normal and transverse contact rigidities. When rotational degrees of freedom are taken into account, the bending and torsional rigidities of the intergrain contacts can control some of the phononic modes. The existence of zero-frequency modes, zero-group-velocity modes and their transformation into slow propagating phononic modes due to weak bending and torsional intergrain interactions are investigated. We also study the formation and manipulation of Dirac cones and multiple degenerated modes. This could motivate variety of potential applications in elastic waves control by manipulating the contact rigidities in granular phononic crystals.
Fichier non déposé

Dates et versions

hal-02535971 , version 1 (07-04-2020)

Identifiants

Citer

Li-Yang Zheng, Hélène Pichard, Vincent Tournat, Georgios Theocharis, Vitali Goussev. Zero-frequency and slow elastic modes in phononic monolayer granular membranes. Ultrasonics, 2016, 69, pp.201-214. ⟨10.1016/j.ultras.2015.11.005⟩. ⟨hal-02535971⟩
18 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More