Enhanced study of rock elastic anisotropy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F16%3A00473296" target="_blank" >RIV/67985831:_____/16:00473296 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced study of rock elastic anisotropy

Popis výsledku v původním jazyce

We present a combined study of a classical rock sample from Val Malenco, Italy, by investigating the microstructure and texture with state-of-the art synchrotron X-ray, neutron diffraction methods and measuring ultrasonic velocities both with a multi anvil apparatus and a novel instrument to measure P and S velocities on spheres. Petrological properties were studied by thin section analysis. Both, synchrotron and neutron diffraction data were analyzed for preferred orientation with the Rietveld method. The program MAUD was used for texture analysis. Velocity measurements were done by classical measurements of P- and S-wave velocities using the pulse transmission technique at room temperature and pressures up to 600 MPa with a triaxial apparatus. There was also measured 3D velocity distribution of spherical samples by P- and S-wave ultrasonic sounding. Determination of P, S1 (fast) and S2 (slow) wave velocities enables to calculate a full stiffness tensor. The crack distribution from non-linear approximation of P-wave measurements on sphere was determined. From quantitative texture measurements, elastic properties are modelled by self-consistent averaging. Comparison of experimental and model Cii parameters is done based on microstructures. Both, results from diffraction methods and velocity measurements are compared. Good agreement between the velocity and microstructural models is observed.

Název v anglickém jazyce

Enhanced study of rock elastic anisotropy

Popis výsledku anglicky

We present a combined study of a classical rock sample from Val Malenco, Italy, by investigating the microstructure and texture with state-of-the art synchrotron X-ray, neutron diffraction methods and measuring ultrasonic velocities both with a multi anvil apparatus and a novel instrument to measure P and S velocities on spheres. Petrological properties were studied by thin section analysis. Both, synchrotron and neutron diffraction data were analyzed for preferred orientation with the Rietveld method. The program MAUD was used for texture analysis. Velocity measurements were done by classical measurements of P- and S-wave velocities using the pulse transmission technique at room temperature and pressures up to 600 MPa with a triaxial apparatus. There was also measured 3D velocity distribution of spherical samples by P- and S-wave ultrasonic sounding. Determination of P, S1 (fast) and S2 (slow) wave velocities enables to calculate a full stiffness tensor. The crack distribution from non-linear approximation of P-wave measurements on sphere was determined. From quantitative texture measurements, elastic properties are modelled by self-consistent averaging. Comparison of experimental and model Cii parameters is done based on microstructures. Both, results from diffraction methods and velocity measurements are compared. Good agreement between the velocity and microstructural models is observed.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LH13102" target="_blank" >LH13102: Kinematická a dynamická anisotropie sedimentárních a krystalických hornin: Ultrazvukové, synchrotronní a měření neutronové difrakce</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

50th US Rock Mechanics / Geomechanics Symposium 2016

ISBN

978-151082802-5

ISSN

—

e-ISSN

—

Počet stran výsledku

9

Strana od-do

2492-2500

Název nakladatele

American Rock Mechanics Association (ARMA)

Místo vydání

Houston

Místo konání akce

Houston

Datum konání akce

26. 6. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—