Publication result detail

VYUŽITÍ ELEKTROMAGNETICKÉ EMISE PŘI LOKALIZACI TRHLIN

P. Sedlak, J. Majzner, J. Sikula and T.Lokajicek

Original Title

VYUŽITÍ ELEKTROMAGNETICKÉ EMISE PŘI LOKALIZACI TRHLIN

English Title

Utilization of Electromagnetic Emission at Cracks Localization

Type

Paper in proceedings (conference paper)

Original Abstract

The cracks can be indicated by electromagnetic (EME) and acoustic (AE) emission when solid, especially non-metallic materials, are mechanically stressed. 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. 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 dimension. The electromagnetic signal precedes the acoustic emission response and time delay corresponds to the difference of propagation velocities of sound and electromagnetic radiation in the sample. The paper describes the use of AE and EME signals to localize the position of the crack in granite sample.

English abstract

The cracks can be indicated by electromagnetic (EME) and acoustic (AE) emission when solid, especially non-metallic materials, are mechanically stressed. 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. 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 dimension. The electromagnetic signal precedes the acoustic emission response and time delay corresponds to the difference of propagation velocities of sound and electromagnetic radiation in the sample. The paper describes the use of AE and EME signals to localize the position of the crack in granite sample.

Keywords

elektromagnetická emise, akustická emise, lokalizace trhlin

Key words in English

Electromagnetic emission, acoustic emission, cracks localization

Authors

P. Sedlak, J. Majzner, J. Sikula and T.Lokajicek

Released

01.01.2005

Publisher

Czech Society for Nondestructive Testing

Location

Znojmo

ISBN

80-214-3053-2

Book

Defektoskopie 2005 - sborník příspěvků

Volume

35

Pages from

207

Pages count

6

BibTex

@inproceedings{BUT16341,
  author="Petr {Sedlák} and Jiří {Majzner} and Josef {Šikula} and Tomáš {Lokajíček}",
  title="VYUŽITÍ ELEKTROMAGNETICKÉ EMISE PŘI LOKALIZACI TRHLIN",
  booktitle="Defektoskopie 2005 - sborník příspěvků",
  year="2005",
  volume="35",
  number="1",
  pages="6",
  publisher="Czech Society for Nondestructive Testing",
  address="Znojmo",
  isbn="80-214-3053-2"
}