Bardin A.A., Orlov A.A., Perchenko S.V. Express Diagnostic Method of the Stress State of Weakly Magnetized Ferromagnetic Rods

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https://doi.org/10.15688/mpcm.jvolsu.2020.1.6

Aleksey A. Bardin
Junior Researcher, Department of Information Systems and Computer Modeling,
Volgograd State University
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Prosp. Universitetsky, 100, 400062 Volgograd, Russian Federation

Andrey A. Orlov
Junior Researcher, Department of Radiophysics,
Volgograd State University
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Prosp. Universitetsky, 100, 400062 Volgograd, Russian Federation

Sergey V. Perchenko
Candidate of Physical and Mathematical Sciences, Associate Professor,
Department of Radiophysics,
Volgograd State University
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Prosp. Universitetsky, 100, 400062 Volgograd, Russian Federation

Abstract. A method for express diagnostics of weakly magnetized ferromagnetic rods is proposed. It is based on measuring the stray magnetic field of the rod. We analyze the inverse magnetostatic problem and formulate the conditions when its regularization is possible. In this case, it is possible to connect the value of the average transverse component of magnetization with the results of the measured stray magnetic field. The distributions of transverse magnetization values were experimentally studied using rods made of SV08G2S [transliterated from Russian] and ER-308LSi steels as an example. The studied samples were subjected to impact plastic deformation, tensile deformation, and torsion deformation. It is shown that this method allows to register areas with stress concentrations without additional magnetization of the test sample. A feature of the method is the use of once calculated system functions without solving large systems of equations and using unstable spectral methods. The method is applicable for cylindrical objects of small radius far from the edge of the test sample, when the magnetization in the cross section of the sample can be considered as constant.

Key words: magnetization, Hall sensor, deformation, flaw detection, stray field.

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Express Diagnostic Method of the Stress State of Weakly Magnetized Ferromagnetic Rods by Bardin A.A., Orlov A.A., Perchenko S.V. is licensed under a Creative Commons Attribution 4.0 International License.

Citation in English: Mathematical Physics and Computer Simulation. Vol. 23 No. 1 2020, pp. 44-79

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