Cracks Characterisation by Acoustic and Electromagnetic Emission

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F02%3APU30700" target="_blank" >RIV/00216305:26220/02:PU30700 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Cracks Characterisation by Acoustic and Electromagnetic Emission

Popis výsledku v původním jazyce

The simultaneous investigation of an electromagnetic (EME) and acoustic (AE) emission in solids is described. This method can give additional information on crack creation kinetic and improve crack localisation and its parameters assessment. Granite samples were loaded with a constant stress rate up to their failure and AE and EME signals measured in four channel set-up. Both signals show different behaviour in the first interval of about 10 ms just after crack creation, where high frequency componentscorresponding to crack walls vibration are dominant, and in the remaining period of about 300 ms where the detected signals time dependence is given mainly by whole sample eigen-vibrations. The EME signal on-set defines exactly the time of crack creationand from the time delay of recorded AE signals the crack position can be determined. The observed high frequency signal of several MHz corresponds to crack length of the order of 1 mm.

Název v anglickém jazyce

Cracks Characterisation by Acoustic and Electromagnetic Emission

Popis výsledku anglicky

The simultaneous investigation of an electromagnetic (EME) and acoustic (AE) emission in solids is described. This method can give additional information on crack creation kinetic and improve crack localisation and its parameters assessment. Granite samples were loaded with a constant stress rate up to their failure and AE and EME signals measured in four channel set-up. Both signals show different behaviour in the first interval of about 10 ms just after crack creation, where high frequency componentscorresponding to crack walls vibration are dominant, and in the remaining period of about 300 ms where the detected signals time dependence is given mainly by whole sample eigen-vibrations. The EME signal on-set defines exactly the time of crack creationand from the time delay of recorded AE signals the crack position can be determined. The observed high frequency signal of several MHz corresponds to crack length of the order of 1 mm.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

EWGAE 2002 Proceegings

ISBN

80-214-2174-6

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

Czech Society for Non-destructive Testing

Místo vydání

Brno

Místo konání akce

Praha

Datum konání akce

11. 9. 2002

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—