The anisotropy of ultrasonic waves velocity and attenuation of migmatite samples under uniaxial loading

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F13%3A00426118" target="_blank" >RIV/67985831:_____/13:00426118 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The anisotropy of ultrasonic waves velocity and attenuation of migmatite samples under uniaxial loading

Popis výsledku v původním jazyce

A method of velocity anisotropy analysis based on conventional ultrasonic transmission technique is presented. Multiple transducers were used to ultrasonic sounding and monitoring of acoustic emission. A sparse network of transducers located on the rockcore surface allows approximation of elastic waves velocity distribution as an ellipsoidal surface. The shape and orientation of velocity ellipsoid is a measure of velocity anisotropy. A study of changes in velocity anisotropy and attenuation was performed on uniaxially loaded migmatite samples with distinct foliation. The cylindrical migmatite samples had a horizontal foliation and one of them had a pre-existed crack. The ultrasonic measurement was carried out during applying a uniaxial constant strain-rate loading. Orientation of the velocity ellipsoid corresponded to the anisotropy of rock structure up to activation of a failure plane. Prior to brittle failure, the axis of minimum velocity rotated from its initial direction normal to

Název v anglickém jazyce

The anisotropy of ultrasonic waves velocity and attenuation of migmatite samples under uniaxial loading

Popis výsledku anglicky

A method of velocity anisotropy analysis based on conventional ultrasonic transmission technique is presented. Multiple transducers were used to ultrasonic sounding and monitoring of acoustic emission. A sparse network of transducers located on the rockcore surface allows approximation of elastic waves velocity distribution as an ellipsoidal surface. The shape and orientation of velocity ellipsoid is a measure of velocity anisotropy. A study of changes in velocity anisotropy and attenuation was performed on uniaxially loaded migmatite samples with distinct foliation. The cylindrical migmatite samples had a horizontal foliation and one of them had a pre-existed crack. The ultrasonic measurement was carried out during applying a uniaxial constant strain-rate loading. Orientation of the velocity ellipsoid corresponded to the anisotropy of rock structure up to activation of a failure plane. Prior to brittle failure, the axis of minimum velocity rotated from its initial direction normal to

Druh

D - Stať ve sborníku

CEP obor

DC - Seismologie, vulkanologie a struktura Země

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název statě ve sborníku

47th US Rock Mechanics/Geomechanics Symposium 2013

ISBN

978-1-62993-118-0

ISSN

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e-ISSN

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Počet stran výsledku

10

Strana od-do

1281-1290

Název nakladatele

Red Hook

Místo vydání

New York

Místo konání akce

San Francisco

Datum konání akce

23. 6. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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