Theoretical and experimental investigation of electro discharge destruction of non-conducting materials

N. Kuznetsova, V. Lopatin, V. Burkin, V. Golovanevskiy, D. Zhgun, N. Ivanov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

The results of electro-discharge fracture of large-size concrete samples with electrical breakdown initiation by the exploding wire are presented. In order to minimize the operating voltage of the pulse generator and to increase the discharge gap and hence the energy absorption by the plasma channel that leads to the fracture build-up, the electro-bursting cartridge (copper wire in polyethylene) was used. With the pulse amplitudes of ∼ (15-20) kV and wire length of ∼ (20-60) mm, concrete blocks of 700*450*300mm size can be fractured. Specific energy deposition of ∼ 60 kJ/cm 3 leads to the pressure buildup of up to 2.5·10 9 Pa in the discharge plasma channel. Under the action of pressure, the highly conductive plasma channel expands and generates the shock wave, causing the mechanical stress formation in the solid. Elastoplastic deformations and radially propagating cracks are launched into the material and this leads to the sample fracture. The dynamics of the generator energy conversion into the plasma channel and into the wave of mechanical stresses in solid is considered. Electro-discharge fracture can be a cost-effective and practical solution for disintegration of the rock mass by splitting rock fragments off the free rock surface in mining, oil and gas, tunnel construction and similar applications.

Original languageEnglish
Title of host publicationIEEE Conference Record - PPC 2011, Pulsed Power Conference 2011: The 18th IEEE International Pulsed Power Conference
Pages267-273
Number of pages7
DOIs
Publication statusPublished - 2011
Event18th IEEE International Pulsed Power Conference, PPC 2011 - Chicago, IL, United States
Duration: 19 Jun 201123 Jun 2011

Conference

Conference18th IEEE International Pulsed Power Conference, PPC 2011
CountryUnited States
CityChicago, IL
Period19.6.1123.6.11

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Cite this

Kuznetsova, N., Lopatin, V., Burkin, V., Golovanevskiy, V., Zhgun, D., & Ivanov, N. (2011). Theoretical and experimental investigation of electro discharge destruction of non-conducting materials. In IEEE Conference Record - PPC 2011, Pulsed Power Conference 2011: The 18th IEEE International Pulsed Power Conference (pp. 267-273). [6191428] https://doi.org/10.1109/PPC.2011.6191428