AE sources characterization by electromagnetic and acoustic emission
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F07%3APU70334" target="_blank" >RIV/00216305:26220/07:PU70334 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
AE sources characterization by electromagnetic and acoustic emission
Original language description
Generation of crack is accompanied by generation of electric charges on the crack walls. This charge can be measured by a capacitance antenna. When a micro-crack is generated in a solid the faces of the crack make up plates of an elementary capacitor andthe charges located on them constitute an electric dipole or quadrupole. The magnitude of the electric charge configuration depends on the time. Experimentally we have observed two different type of signals like damped harmonic motion with: (i) exponentially time dependent transient value and (ii) constant average value. we suppose that first one is generated by dipole structure and second one is generated by quadrupole. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the electric charge distribution. The recorded electric signal is superposition of crack walls "self" vibration given by crack length and vibration due to an ul
Czech name
Charakterizace zdrojů akustické emise pomocí elektromagnetické a akustické emise
Czech description
Generace trhlin je doprovázena vznikem elektrického náboje na stěnách trhliny. Tento náboj je možné měřit kapacitním snímačem. Uvedeného jevu je možné využít ke studiu vzniku trhlin.
Classification
Type
D - Article in proceedings
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
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)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
New trends in physics
ISBN
978-80-7355-078-3
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
69-72
Publisher name
Z. Novotný, Ing., CSc.
Place of publication
Brno
Event location
Brno
Event date
Nov 15, 2007
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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