Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
Complex Band Structure of 1-D Solid Phononic Crystals with Viscoelasticity
Submission Author:
Edson Jansen Pedrosa de Miranda Junior , MA
Co-Authors:
Lucas Franco Correa Schalcher, Jose Maria Campos dos Santos, Edson Jansen Pedrosa de Miranda Junior
Presenter: Edson Jansen Pedrosa de Miranda Junior
doi://10.26678/ABCM.DINAME2023.DIN2023-0011
Abstract
The wave propagation in a 1-D solid phononic structure (PnS) with viscoelasticity is investigated. This solid PnS, composed by an epoxy matrix and steel inclusions, is capable of filtering the propagation of elastic bulk waves over a specified range of frequency, called band gaps. The real and complex band structures are obtained by the improved plane wave expansion (IPWE) and extended plane wave expansion (EPWE) methods, respectively. The viscoelasticity is considered by using the standard linear solid model. The viscoelasticity influences significantly the band gap formation, and the propagating and evanescent modes. The results can be useful for the understanding of the elastic bulk wave attenuation in 1-D solid periodic structures with viscoelasticity.
Keywords
wave attenuation, bulk elastic waves, band gaps, standard linear solid model
