A Model for an Electromagnetic Emission Signal Generated by Crack Creation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F01%3APU23921" target="_blank" >RIV/00216305:26220/01:PU23921 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
A Model for an Electromagnetic Emission Signal Generated by Crack Creation
Original language description
When a stress is applied to the solids (rocks or tiles) cracks creation can be detected by signals of an acoustic and electromagnetic emission. The experimental study has been performed on rock samples. Two metallic layers have covered the tested devicesto create metal-insulator-metal structure. During the process of the crack generation the electric charges appeared at the faces of the cracks. The electric dipole system is a source of voltage induced on metal electrodes. Using Shockley-Ramo theorem, tthe differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the dipole width and its active area. The recorded electric signal is superposition of crack walls "self" vibration given by crack length and vibration due to an ultrasonic wave given by sample dimensions. The electromagnetic signal precedes the acoustic emission response and time delay corresponds to the difference of propagation velocities of sound and elec
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA102%2F99%2F1088" target="_blank" >GA102/99/1088: Noise spectroscopy and diagnostics of insulating systems with high temperature-proof materials</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2001
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of NDT in Progress
ISBN
80-238-7263-X
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
283-290
Publisher name
Czech Society for Non-Destructive Testing, German Society for Non-Destructive Testing
Place of publication
Praha
Event location
Třešť
Event date
Jun 20, 2001
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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