THE STRUCTURE AND MECHANISM OF CONVERGENCE OF A CYLINDRICAL SHELL MADE OF LOW CARBON STEEL UNDER EXPLOSIVE LOADING
- Authors: Zel’dovich V.I.1, Khomskaya I.V.1, Balushkin S.V.2, Shorokhov E.V.2, Abdullina D.N.2, Timonina A.E.1
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Affiliations:
- Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences
- Russian Federal Nuclear Center – Zababakhin All-Russian Research Institute of Technical Physics
- Issue: Vol 126, No 8 (2025)
- Pages: 891-899
- Section: СТРУКТУРА, ФАЗОВЫЕ ПРЕВРАЩЕНИЯ И ДИФФУЗИЯ
- URL: https://ogarev-online.ru/0015-3230/article/view/305797
- DOI: https://doi.org/10.7868/S3034621525080075
- ID: 305797
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Abstract
An experiment was performed on the convergence of a thick-walled cylindrical shell made of steel 20 under the action of an explosion. The explosion was initiated from eight points evenly spaced along the ring on the
cylindrical surface of the shell. It is established that convergence begins by a solid-state mechanism, with
division into eight fragments according to the number of initiation points. In the process of convergence, the solid-state mechanism is replaced by a hydrodynamic one, in which the shell converges without collapsing, through the formation of ejections (cumulative jets), their expansion and closure in the center of the shell. The change in the convergence mechanism is explained by a decrease in strength and an increase in the ductility of the steel due to an increase in the temperature of the shell during the convergence process. The study of the microstructure showed that high-speed deformation during convergence occurs with the formation of extended bands of localized shear and vortex structures.
About the authors
Vitaliy I. Zel’dovich
Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences
Email: zeldovich@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
Irina V. Khomskaya
Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences
Email: khomskaya@imp.uran.ru
Russian Federation, Ekaterinburg, 620108
Sergey V. Balushkin
Russian Federal Nuclear Center – Zababakhin All-Russian Research Institute of Technical Physics
Email: m.v.nikiforov@vniitf.ru
Russian Federation, Snezhinsk, 456770
Evgeniy V. Shorokhov
Russian Federal Nuclear Center – Zababakhin All-Russian Research Institute of Technical Physics
Email: khomskaya@imp.uran.ru
Russian Federation, Snezhinsk, 456770
Daria N. Abdullina
Russian Federal Nuclear Center – Zababakhin All-Russian Research Institute of Technical Physics
Author for correspondence.
Email: abdullina@imp.uran.ru
научный сотрудник, отдел материаловедения
Russian Federation, Snezhinsk, 456770Anastasia E. Timonina
Miheev Institute of Metal Physics, Ural Branch of Russian Academy of Sciences
Email: timoninaa_10@mail.ru
Russian Federation, Ekaterinburg, 620108
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