Publication result detail

Noise Spectroscopy of Mechanically Stressed Insulators

KOKTAVÝ, B.; KOKTAVÝ, P.

Original Title

Noise Spectroscopy of Mechanically Stressed Insulators

English Title

Noise Spectroscopy of Mechanically Stressed Insulators

Type

Paper in proceedings (conference paper)

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.

English 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

Key words in English

Crack, Electric charge, Electromagnetic emission, Acoustic emission

Authors

KOKTAVÝ, B.; KOKTAVÝ, P.

Released

05.09.2006

Publisher

Slovak University of Technology in Bratislava

Location

Bratislava

ISBN

80-227-2467-X

Book

Physical and Material Engineering 2006

Pages from

52

Pages 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"
}