Analyzing deformation and fracture of dielectrics by integral characteristics of their electromagnetic emission

Lyudmila Yavorovich, Anatoly Bespalko, Pavel Fedotov, Aleksey Popelyaev

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

1 Citation (Scopus)

Abstract

Revealing of fracture harbingers of dielectric materials, that are under mechanical stress, is an important practical and scientific problem. Local stresses, produced by mechanical impact, can exceed the local strength, and a stress-strain state changes. As the result of such impacts, microcracks appear and lead to fracture. During change of stress-strain state, mechanoelectric transformations occur, that generate electromagnetic emission. So we aimed to observe regularities in electromagnetic emission characteristics. Rock samples, collected from Tashtagol ore-mine of Kemerovo region of Russia, were used as dielectric materials for the research. For analysis of rock samples deformation and fracture, integral characteristics of time series of electromagnetic emission were used. Observed, that low-strength samples accumulate and relax elastic energy stepwise unlike to high-strength samples, that accumulate energy linearizely. Differences in dispersion characteristics of samples differing with strength are observed. The research showed usability of suggested algorithms.

Original languageEnglish
Title of host publicationMultifunctional Materials
Subtitle of host publicationDevelopment and Application
EditorsIrina Kurzina, Anna Godymchuk
PublisherTrans Tech Publications Ltd
Pages36-43
Number of pages8
ISBN (Print)9783038357292
DOIs
Publication statusPublished - 2016
Event12th International Conference on Prospects of Fundamental Sciences Development, PFSD 2015 - Tomsk, Russian Federation
Duration: 21 Apr 201524 Apr 2015

Publication series

NameKey Engineering Materials
Volume683
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference12th International Conference on Prospects of Fundamental Sciences Development, PFSD 2015
CountryRussian Federation
CityTomsk
Period21.4.1524.4.15

Keywords

  • Dielectric material
  • Electromagnetic emission
  • Mechanoelectric transformations
  • Time series

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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