Investigation of electromagnetic excitation method of volumetric ultrasonic waves in the metal half-space. Part 1.
Main Article Content
Abstract
Solved the boundary problem of electrodynamics of distribution in space variable magnetic field of the ring coil which located in the vacuum above the surface of the half-filled magnetized ferromagnet. Studied the distribution of the axial and radial components of the stress vector of the alternating magnetic field in the volume of a ferromagnet at various frequencies. Calculated surface and bulk density of the ponderomotive forces of electromagnetic fields and forces of the Joule, which determine the deformation of a ferromagnet in the direct magnetostrictive effect. It is shown that when the field intensity of magnetization about half of the coercive force of a ferromagnet Joule forces almost four orders exceed ponderomotive action of electromagnetic field. It is established that with the increase in the frequency of changing the sign of the alternating magnetic field is sharply reduced values of axial field components of Joule forces. It is shown that at frequencies of the order of one megahertz and above, alternating magnetic field of the ring coil in the presence of vertical field of the magnetization creates bias on a surface and in the bulk of a ferromagnet practically only radial oriented surface and volumetric Joule forces.
References 13, figures 7.
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
References
Kavashima K. (1976), “Experiments with two types of electromagnetic ultrasonic transducers”. Acoust. Soc. Amer. No 2. Pp. 365 – 373.
Kavashima K. (1976), “Theory and numerical calculation of the acoustic field produced in metal by an electromagnetic ultrasonic transducer”. J. Acoust. Soc. Amer. No 5. Pp. 1089 – 1099.
Grinchenko V.T., Petryschev O. N. (1986), “Excitation by an external magnetic field of elastic waves in the longitudinal polarized magnetostrictive strip”. Journal of Applied mechanics. Vol. 22, no. 7. pp. 60–65. (Rus)
Grinchenko V.T., Petryschev O. N. (1987), “The study of patterns of the excitation process of elastic waves under complex loading area isotropic elastic band”. Izv. AN Arm. SSR. Mechanics. Vol.40, no 6. pp. 22–31. (Rus)
Grinchenko V.T., Meleshko V. V. (1981), “Harmonic oscillations and waves in elastic bodies”. Kyiv, Naukova dumka. P. 283. (Rus)
Koshlyakov N. S., Gliner E. B., Smirnov M. M. (1970), “Partial differential equations of mathematical physics” Мoscow, Vysshaya shkola. P. 710 . (Rus)
Petryschev O. N. (2005), “Excitation of the electromagnetic field of Rayleigh waves in ferromagnetic metals”. Technical diagnostics and nondestructive testing. No 4. pp. 23 – 30. (Rus)
Petryschev O. N. (2005), “Principles of mathematical modeling electromagnetic ultrasonic transducer mode excitation of elastic waves”. Electronics and communications. No 25. pp. 50 – 61. (Rus)
Petryschev O. N. (2007), “Electromagnetic excitation in metal sheets radially propagating Lamb waves”. Actual aspects of physical and mechanical tests. Acoustics and waves. Kiyv, Naukova dumka. pp. 259 – 273. (Rus)
M. Abramowitz, I. Stegun (1979), “Handbook of Mathematical Functions with formulas, graphs and mathematical tables”. Мoscow, Nauka. P. 832 . (Rus)
Tamm I. E. (1976), “Fundamentals of the theory of electricity”. Мoscow, Nauka. P. 616 . (Rus)
Suchkov G. M. (2005), “Modern possibilities of EMA defectoscopy”. Defectoscopy. No 12. pp. 24 – 39. (Rus)
Shubayev S. N. (1974), “Excitation of elastic waves in a half-metallic electromagnetic method”. Defec-toscopy. No 2. pp. 45 – 55. (Rus)
