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ISSN Печать: 2572-4258
ISSN Онлайн: 2572-4266
Indexed in
MODELING THE HEALING OF MICROCRACKS IN METAL STIMULATED BY A PULSED HIGH-ENERGY ELECTROMAGNETIC FIELD. PART I
Краткое описание
The processes occurring in metallic specimens under the impact of electric high-density current are considered. The electric and temperature fields and their influence on the phase transformation and stress−strain state in the vicinity of microdefects in the form of plane cracks are studied. A mathematical model of the effect of an electromagnetic field on the predamaged elastic-plastic material with an ordered system of defects is proposed. The model accounts for melting and evaporation of material and the dependence of its all physical and mechanical properties on temperature. The problem is solved by finite elements method with the use of an adaptive mesh on the basis of an arbitrar Euler−Lagrange method. The numerical modeling has shown that in the vicinity of microdefects a high-density current with large field gradients arises, which leads to intense local heating accompanied by thermal expansion and melting of the metal on the tips of the microcracks. This results in high compressive stresses in the vicinity of microcracks, intense plastic flow of the material and, as a consequence, in the clamping of microcrack sides, decrease in microcrack length, and in the ejection of the molten material into the crack. As a result, the microcrack is completely healed. The numerical results obtained by the proposed model agree with experiment.
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Kukudzhanov Konstantin V., Levitin Aleksandr Leonidovich, Ugurchiev Umar Kh., Healing of cracks in plates by strong electromagnetic field, Вестник Самарского государственного технического университета. Серия «Физико-математические науки», 25, 1, 2021. Crossref
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Kukudzhanov K V, Modeling of self-healing of microcracks in the process of longitudinal electroplastic rolling, Journal of Physics: Conference Series, 2231, 1, 2022. Crossref