Noise Spectroscopy of Mechanically Stressed Insulators

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F06%3APU62986" target="_blank" >RIV/00216305:26220/06:PU62986 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Noise Spectroscopy of Mechanically Stressed Insulators
Original language description
The phenomenon of stochastic electromagnetic emission (EME) from solids is based on the generation of an electromagnetic field accompanying the mechanical excitation of the solids in question. The crack walls are executing damped oscillations thus givingrise to electric charge oscillations. The charge movement induces electric potentials in electrodes, which are applied to the specimen. An acoustic emission signal, which is due to the crack generation, is measured at the same time. The acoustic and electromagnetic signals are shifted in time against each other in consequence of the different wave propagation velocities. The time shift is also influenced by the acoustic sensor's distance from the crack location. Our measurements were carried out in EXTREN composite, a building industry material. The measurement results are in a good agreement with the current theory of electromagnetic emission from mechanically stressed materials.
Czech name
Šumová spektroskopie mechanicky zatěžovaných pevných látek
Czech description
Článek pojednává o elektromagnetické emisi generované při vzniku trhlin při mechanickém zatěžování pevných látek.

Project
<a href="/en/project/GA103%2F06%2F0708" target="_blank" >GA103/06/0708: Acoustic and electromagnetic emission in materials research</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2006
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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