The Acoustic Field of the Near Radiation Zone Formed upon EMAC in Metals
Source abstract
Abstract
This paper analyzes the behavior of bulk types of waves generated by a circular bus with current by the magnetostriction mechanism in a normal polarizing field in a magnetic high-conductivity halfspace in relative proximity to a media boundary. Calculated dependences of the module of the amplitude and the angle characterizing the direction of radiation of bulk waves in the near zone are presented for radiators of different shapes. It has been shown that the acoustic field in the near radiation zone is a superimposition of waves that differ from purely longitudinal or shearing waves due to a considerable contribution of harmonics from the decaying part of the spectrum. The characteristic points of the field (the maximum amplitudes) decay abruptly and are shifted inward by curved trajectories; it is only in the far zone that they are transformed into straight lines directed at certain angles. Recommendations for determining the transition region between the zones are given.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ultrasonics and Acoustic Wave Propagation · Geophysical Methods and Applications · High-Velocity Impact and Material Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (9)
Show source-provided references
1. Komarov, V.A., Informational Properties of Spectral-Harmonic Models for Contactless Methods for the Assessment of Physical and Mechanical Properties of Materials, Defektoskopiya, 2002, no. 11, pp. 60–72 [Russian J. of Nondestructive Testing(Engl. Transl.), 2002, vol. 38, no. 11, p. 841].10.1023/A:1023761927569 ↗
2. Komarov, V.A., Muzhitskii, V.F., and Gurevich, S.Yu., Teoriya fizicheskikh polei. T. III. Svyazannye polya (Theory of Physical Fields, vol. 3: Related Fields), Chelyabinsk, Izhevsk: South-Ural Univ., 2000.
3. Bergman, L., Ul’trazvuk (Ultrasound), Moscow: IIA, 1957.
4. Lependin, L.F., Akustika (Acoustics), Moscow: Vyssh. Shkola, 1978.
5. Skuchik, E., Osnovy akustiki (Fundamentals of Acoustics), Moscow: Mir, 1976, vol. 2.
6. Buzhan, V.V., Glushkov, E.V., and Glushkova, N.V., Power Balance of Internal Sources of Harmonic Vibrations in an Elastic Halfspace, Akusticheskii Zh., 1991, vol. 37, no. 5, pp. 879–885.
7. Komarov, V.A., Magnetostriction Electromagnetic-Acoustic Conversion in a Normal Polarizing Field, Defektoskopiya, 2004, no. 3, pp. 43–55 [Russian J. of Nondestructive Testing(Engl. Transl.), 2004, vol. 40, no. 3, p. 178].10.1023/B:RUNT.0000040176.10673.ae ↗
8. Komarov, V.A. and Muzhitskii, V.F., Teoriya fizicheskikh polei. Ch. 1. Elektromagnitnoe pole (Theory of Physical Fields, Pt. 3: Electromagnetic Field), Izhevsk: RIO UDGU, 1997.
9. Komarov, V.A., Kvazistatsionarnoe elektromagnitno-akusticheskoe preobrazovanie v metallakh (Quasi-static Electromagnetic-Acoustic Transformation in Metals), Sverdlovsk: UNTs AN SSSR (Ural Sci. Center, USSR Acad. of Sci.), 1986.