Guided waves in stratified media with equal acoustic impedances. (July 2022)

• Record Type: Journal Article
• Authors: Kuznetsov, Sergey V.
• Is Part Of: Mechanics of materials. Volume 170(2022)
• Publication Date: 2022-07
• Subjects: Guided wave -- Lamb wave -- Acoustic impedance -- Dispersion -- Stratified medium; Strength of materials -- Periodicals; Mechanics, Applied -- Periodicals; Résistance des matériaux -- Périodiques; Mécanique appliquée -- Périodiques; Mechanics, Applied; Strength of materials; Periodicals; Electronic journals; 620.11
• DOI: 10.1016/j.mechmat.2022.104338
• Languages: English
• ISSNs: 0167-6636

Abstract

Abstract: Dispersion of guided waves propagating in layered media containing layers with equal acoustic impedances is analyzed by Cauchy sextic formalism coupled with the exponential fundamental matrix method. The cases of layers with equal acoustic impedances apparently have not been studied yet. However, dispersion in such a medium exhibits several peculiarities that may be essential for developing the acoustic non-destructive testing methods. Highlights: Dispersion of guided waves propagating in layered media containing layers with equal acoustic impedances is analyzed. Cauchy sextic formalism coupled with the exponential fundamental matrix method is used. The cases of layers with equal acoustic impedances are studied. Dispersion exhibits the anomalous behavior. The outer layers become invisible.