Fracturing of migmatite monitored by acoustic emission and ultrasonic sounding

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F19%3A00494576" target="_blank" >RIV/67985530:_____/19:00494576 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/19:00494576 RIV/00216208:11310/19:10472519

Výsledek na webu

<a href="https://link.springer.com/article/10.1007%2Fs00603-018-1590-2" target="_blank" >https://link.springer.com/article/10.1007%2Fs00603-018-1590-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00603-018-1590-2" target="_blank" >10.1007/s00603-018-1590-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fracturing of migmatite monitored by acoustic emission and ultrasonic sounding

Popis výsledku v původním jazyce

Here, we present an experimental study of the fracturing of anisotropic migmatite with plane-parallel structure (foliation). Four specimens, with different dips of foliation, including subhorizontal (13 degrees), subvertical (86 degrees), and oblique (47 degrees, 67 degrees), were uniaxially loaded up to failure. Acoustic emission monitoring and ultrasonic sounding were applied for fracturing characterization. In case of subhorizontal and subvertical foliation, the tensile source type played an important role before reaching nucleation stress when shearing became dominant. The dominance of non-tension microcracking was characteristic for oblique foliation. The uniaxial loading of migmatite resulted in triaxial stress state regardless of the foliation dip. The minimum stress axis was in the subhorizontal direction of the foliation dip. The triaxial stress state caused the preferential orientation of induced shear and tension microcracks that had the same azimuthal orientation as the foliation. Preferential microcracking resulted in preferential orientation of the failure plane. Based on the anisotropic behavior of migmatite's characteristic mechanical properties, as well as its mechanism of failure that is typical for anisotropic rocks, the obtained conclusions may be generalized for other types of metamorphic anisotropic rocks with a plane-parallel structure.

Název v anglickém jazyce

Fracturing of migmatite monitored by acoustic emission and ultrasonic sounding

Popis výsledku anglicky

Here, we present an experimental study of the fracturing of anisotropic migmatite with plane-parallel structure (foliation). Four specimens, with different dips of foliation, including subhorizontal (13 degrees), subvertical (86 degrees), and oblique (47 degrees, 67 degrees), were uniaxially loaded up to failure. Acoustic emission monitoring and ultrasonic sounding were applied for fracturing characterization. In case of subhorizontal and subvertical foliation, the tensile source type played an important role before reaching nucleation stress when shearing became dominant. The dominance of non-tension microcracking was characteristic for oblique foliation. The uniaxial loading of migmatite resulted in triaxial stress state regardless of the foliation dip. The minimum stress axis was in the subhorizontal direction of the foliation dip. The triaxial stress state caused the preferential orientation of induced shear and tension microcracks that had the same azimuthal orientation as the foliation. Preferential microcracking resulted in preferential orientation of the failure plane. Based on the anisotropic behavior of migmatite's characteristic mechanical properties, as well as its mechanism of failure that is typical for anisotropic rocks, the obtained conclusions may be generalized for other types of metamorphic anisotropic rocks with a plane-parallel structure.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10507 - Volcanology

Projekt

<a href="/cs/project/GA16-03950S" target="_blank" >GA16-03950S: Mód porušování pevných těles na základě střižně-tahového modelu: laboratorní monitorování akustické emise</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Rock Mechanics and Rock Engineering

ISSN

0723-2632

e-ISSN

—

Svazek periodika

52

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

13

Strana od-do

47-59

Kód UT WoS článku

000456673000004

EID výsledku v databázi Scopus

2-s2.0-85053439932