Influence of a Strong Low-Frequency Wave on the Propagation of Weak Ultrasonic Pulses in a Rod Resonator Made of Annealed Polycrystalline Copper

An experimental study of an influence of a strong low-frequency wave on the propagation of weak ultrasonic pulses in an acoustic resonator made of annealed polycrystalline copper has been carried out. The measurements were carried out with harmonic excitation of the resonator at its first four longi...

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Bibliographic Details
Published inTechnical physics Vol. 68; no. Suppl 3; pp. S574 - S578
Main Authors Nazarov, V. E., Kolpakov, A. B.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2023
Springer Nature B.V
Subjects
Annealing
Classical and Continuum Physics
Copper
Equations of state
Harmonic excitation
Nonlinearity
Physics
Physics and Astronomy
Polycrystals
Resonators
Wave propagation
elastic waves
dislocation dissipative and reactive nonlinearity
polycrystalline copper
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Summary:An experimental study of an influence of a strong low-frequency wave on the propagation of weak ultrasonic pulses in an acoustic resonator made of annealed polycrystalline copper has been carried out. The measurements were carried out with harmonic excitation of the resonator at its first four longitudinal modes in the range from 2 to 15 kHz, the frequency of ultrasonic pulses varied from 65 to 400 kHz. The analysis of the observed nonlinear effects was carried out within the framework of the polycrystal equation of state obtained on the basis of a modified string model of the Granato-Lucke dislocation. The values of the parameters of dissipative and reactive nonlinearity of dislocations in annealed copper are determined.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784223900887