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KOKTAVÝ, B. KOKTAVÝ, P.
Original Title
Noise Spectroscopy of Mechanically Stressed Insulators
Type
conference paper
Language
English
Original Abstract
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 giving rise 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 sensors 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.
Keywords
Crack, Electric charge, Electromagnetic emission, Acoustic emission
Authors
KOKTAVÝ, B.; KOKTAVÝ, P.
RIV year
2006
Released
5. 9. 2006
Publisher
Slovak University of Technology in Bratislava
Location
Bratislava
ISBN
80-227-2467-X
Book
Physical and Material Engineering 2006
Pages from
52
Pages to
55
Pages count
4
BibTex
@inproceedings{BUT20218, author="Bohumil {Koktavý} and Pavel {Koktavý}", title="Noise Spectroscopy of Mechanically Stressed Insulators", booktitle="Physical and Material Engineering 2006", year="2006", pages="4", publisher="Slovak University of Technology in Bratislava", address="Bratislava", isbn="80-227-2467-X" }