Relation between crack geometrical parameters, fracture toughness and rock microstructure investigated using X-ray computed tomography

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F24%3A00597605" target="_blank" >RIV/67985891:_____/24:00597605 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68145535:_____/24:00597605

Výsledek na webu

<a href="http://dx.doi.org/10.1201/9781003429234-216" target="_blank" >http://dx.doi.org/10.1201/9781003429234-216</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1201/9781003429234-216" target="_blank" >10.1201/9781003429234-216</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Relation between crack geometrical parameters, fracture toughness and rock microstructure investigated using X-ray computed tomography

Popis výsledku v původním jazyce

In this contribution, the initial results of the study of the influence of rock microstructure and composition on the fracture toughness (FT) of rocks measured by the chevron bend (CB) test and subsequent analysis of cracks geometry using X-ray computed tomography (XCT) are presented. A total of 10 different types of rocks, mostly sandstones, were used for this testing. On the basis of laboratory experiments, the following conclusions can be made: (1) the value of crack length generally increases with decreasing rock porosity, (2) the value of crack length generally increases with increasing value of fracture toughness, (3) the value of the crack length of sandstones increases with a growing degree rock matrix silicification, (4) in porous rocks like sandstones, the crack propagation goes preferably throughout the pore space, and (5) in low-porosity crystalline igneous and metamorphic rocks, the cracks spread along grain bound-naries and often also break mineral grains.

Název v anglickém jazyce

Relation between crack geometrical parameters, fracture toughness and rock microstructure investigated using X-ray computed tomography

Popis výsledku anglicky

In this contribution, the initial results of the study of the influence of rock microstructure and composition on the fracture toughness (FT) of rocks measured by the chevron bend (CB) test and subsequent analysis of cracks geometry using X-ray computed tomography (XCT) are presented. A total of 10 different types of rocks, mostly sandstones, were used for this testing. On the basis of laboratory experiments, the following conclusions can be made: (1) the value of crack length generally increases with decreasing rock porosity, (2) the value of crack length generally increases with increasing value of fracture toughness, (3) the value of the crack length of sandstones increases with a growing degree rock matrix silicification, (4) in porous rocks like sandstones, the crack propagation goes preferably throughout the pore space, and (5) in low-porosity crystalline igneous and metamorphic rocks, the cracks spread along grain bound-naries and often also break mineral grains.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

<a href="/cs/project/GA23-05128S" target="_blank" >GA23-05128S: Vliv strukturních a texturních prvků na porušování transverzálně izotropních hornin zkoumaný pomocí 4D výpočetní tomografie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the ISRM European Rock Mechanics Symposium EUROCK 2024

ISBN

978-103255144-9

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1409-1415

Název nakladatele

CRC Press

Místo vydání

Alicante

Místo konání akce

Alicante

Datum konání akce

15. 7. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001310272000216