Skip to Main content Skip to Navigation
New interface
Journal articles

Continuum constitutive laws to describe acoustic attenuation in glasses

Abstract : Nowadays metamaterials are at the focus of an intense research as promising for thermal and acoustic engineering. However, the computational cost associated to the large system size required for correctly simulating them imposes the use of finite-elements simulations, developing continuum models, able to grasp the physics at play without entering in the atomistic details. Still, a correct description should be able to reproduce not only the extrinsic scattering sources on waves propagation, as introduced by the metamaterial microstructure, but also the intrinsic wave attenuation of the material itself. This becomes dramatically important when the metamaterial is made out of a glass, which is intrinsically highly dissipative and with a wave attenuation strongly dependent on frequency. Here we propose a continuum mechanical model for a viscoelastic medium, able to bridge atomic and macroscopic scale in amorphous materials and describe phonon attenuation due to atomistic mechanisms, characterized by a defined frequency dependence. This represents a first decisive step for investigating the effect of a complex nano- or microstructure on acoustic attenuation, while including the atomistic contribution as well.
Document type :
Journal articles
Complete list of metadata
Contributor : Armelle VIDAL Connect in order to contact the contributor
Submitted on : Tuesday, November 24, 2020 - 11:13:31 PM
Last modification on : Saturday, September 24, 2022 - 2:30:05 PM
Long-term archiving on: : Thursday, February 25, 2021 - 9:20:56 PM


Publisher files allowed on an open archive



H. Luo, A. Gravouil, Valentina Giordano, Walter Schirmacher, Anne Tanguy. Continuum constitutive laws to describe acoustic attenuation in glasses. Physical Review E , 2020, 102 (3), pp.033003. ⟨10.1103/PhysRevE.102.033003⟩. ⟨hal-02968765⟩



Record views


Files downloads