Dissipative and hysteresis loops as images of irreversible processes in nonlinear acoustic fields

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): Claes Hedberg, Oleg Rudenko
Title: Dissipative and hysteresis loops as images of irreversible processes in nonlinear acoustic fields
Journal: Journal of Applied Physics
Year: 2011
Volume: 110
Issue: 5
Pagination: Article number 053503
ISSN: 0021-8979
Publisher: American Institute of Physics
URI/DOI: 10.1063/1.3631800
ISI number: 000294968600042
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Mechanical Engineering (Sektionen för ingenjörsvetenskap - avd. för maskinteknik)
School of Engineering S- 371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Language: English
Abstract: Irreversible processes taking place during nonlinear acoustic wave propagation are considered using a representation by loops in a thermodynamic parameter space. For viscous and heat conducting media, the loops are constructed for quasi-harmonic and sawtooth waves and the descriptive equations are formulated. The linear and nonlinear absorptions are compared. For relaxing media, the processes are frequency-dependent. The loops broadens, narrows, and bends. The linear and nonlinear relaxation losses of wave energy are shown. Residual stresses and irreversible strains appear for hysteretic media, and here, a generalization of Rayleigh loops is pictured which takes into account the nonlinearly frequency-dependent hereditary properties. These describe the dynamic behavior, for which new equations are derived.
Subject: Physical Acoustics\General
Keywords: Conducting media, Dynamic behaviors, Frequency-dependent; Hereditary property, Irreversible process, Irreversible strain, Nonlinear absorptions, Nonlinear acoustic fields, Nonlinear acoustic wave propagation; Rayleigh; Relaxation loss, Saw-tooth waves, Thermodynamic parameter, Wave energy
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