Calculation of stresses initiated by an electric explosion of conductors in a composite thick-walled cylinder

Authors

  • Victor M. Kats St Petersburg State University, 7–9, Universitetskaya nab., St Petersburg, 199034, Russian Federation
  • Viktor A. Morozov St Petersburg State University, 7–9, Universitetskaya nab., St Petersburg, 199034, Russian Federation
  • Yaroslav A. Sevastyanov St Petersburg State University, 7–9, Universitetskaya nab., St Petersburg, 199034, Russian Federation

DOI:

https://doi.org/10.21638/spbu01.2022.210

Abstract

The paper presents a dynamic loading analysis of a material carried out by the exploding wire method (EWM). A composite cylinder is chosen as an experimental sample. It is a thick-walled cylinder made of polymethyl methacrylate with an axial bore formed therein, pressed into an aluminium shell. The sample was loaded by applying an electric voltage to a conductor in the form of a copper wire placed inside the axial bore of the sample. An equation of state for an electric explosion of a conductor obtained. Dependence between the pressure in the air channel and the expansion coefficient of the EWM products demonstrated with comparison charts of the experimental and theoretical values. A theoretical model that describes the amplitude characteristic of the radial stresses arising during the loading is constructed, taking into account the boundary and initial conditions. The substantiation of the model accuracy is given by comparing the obtained results with experimental data. The estimation of the circumferential stress at which the aluminium shell breaks directly performed.

Keywords:

dynamic loading, radial stress, thick-walled cylinder, electric explosion of conductors

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References

Литература

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References

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Published

2022-07-06

How to Cite

Kats, V. M., Morozov, V. A., & Sevastyanov, Y. A. (2022). Calculation of stresses initiated by an electric explosion of conductors in a composite thick-walled cylinder. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 9(2), 294–304. https://doi.org/10.21638/spbu01.2022.210

Issue

Vol. 9 No. 2 (2022)

Section

Mechanics

License

Articles of "Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy" are open access distributed under the terms of the License Agreement with Saint Petersburg State University, which permits to the authors unrestricted distribution and self-archiving free of charge.