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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
conference paper
Language
Czech
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.
Keywords
elektromagnetická emise, akustická emise, lokalizace trhlin
Key words in English
Electromagnetic emission, acoustic emission, cracks localization
Authors
RIV year
2005
Released
1. 1. 2005
Publisher
Czech Society for Nondestructive Testing
Location
Znojmo
ISBN
80-214-3053-2
Book
Defektoskopie 2005 - sborník příspěvků
Edition number
1
Pages from
207
Pages to
212
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" }