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- Title
Electromagnetic Methods for Testing Changes in Stress-Strain State of Dielectric Materials.
- Authors
Bespal'ko, A. A.; Dann, D. D.; Petrov, M. V.; Pomishin, E. K.; Utsin, G. E.; Fedotov, P. I.
- Abstract
We consider complex methods for mechanical-electrical and acoustic-electrical testing of cracking under changes in the stress-strain state using the example of dielectric rock samples. The paper discusses the results of numerical and experimental studies of changes in the parameters of electromagnetic responses under a pulse deterministic acoustic excitation of rock samples with different compositions and textures and presents results of mathematical calculations of stress concentration on cracks located along the sample axis, perpendicular to which deterministic acoustic pulses were introduced. The results of experimental studies of electromagnetic emission of a sample containing calcite and magnetite under uniaxial compression up to fracture are shown. Regularities of changes in the amplitudes of electromagnetic signals during acoustic probing in the process of "stepwise" uniaxial loading by compression up to fracture are given.
- Subjects
ELECTROMAGNETIC testing; DIELECTRIC materials; STRAINS &; stresses (Mechanics); STRESS concentration; COMPRESSION fractures; ACOUSTIC emission
- Publication
Russian Journal of Nondestructive Testing, 2021, Vol 57, Issue 10, p865
- ISSN
1061-8309
- Publication type
Article
- DOI
10.1134/S1061830921100028