A New DIC‑Based Method to Identify the Crack Mechanism and Applications in Fracture Analysis of Red Sandstone Containing a Single Flaw

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F21%3A00543994" target="_blank" >RIV/68145535:_____/21:00543994 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/content/pdf/10.1007/s00603-021-02472-5.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007/s00603-021-02472-5.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00603-021-02472-5" target="_blank" >10.1007/s00603-021-02472-5</a>

Result language

angličtina

Original language name

A New DIC‑Based Method to Identify the Crack Mechanism and Applications in Fracture Analysis of Red Sandstone Containing a Single Flaw

Original language description

As a representative non-interferometric optical technique, the digital image correlation (DIC) can provide full-field displacement and strain measurement for the deformed rocks. However, the standard DIC technique has a limitation in measuring the displacements at the discontinuity and cannot be directly used for identifying the crack mechanism. Thus, a new DIC-based method is proposed for automatically tracing the discontinuities and quantitatively identifying the crack mechanism, i.e. mode I, mode II, and mixed-mode I/II. The new method involves three steps, including displacement measurement from the standard DIC technique, displacement field reconstruction at the discontinuity with the modified subset splitting technique, and post-processing for crack identification and displacement jump measurement. The effectiveness and robustness of the modified subset splitting technique and post-processing method have been verified with the synthetic images and theoretical ndisplacement fields of mode I crack and dislocation. Then, the proposed method is utilized to locate cracks and quantitatively identify the crack mechanism of the initiated cracks in red sandstone containing a single flaw under uniaxial compression. The crack development in the flawed red sandstone specimens is analyzed and the crack types are summarized, in which wing cracks are in mode I, while horsetail cracks and anti-wing cracks are identified as mixed-mode I/II crack. It is shown that the new method avoids some ambiguous identification of crack mechanism and present more objective results.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Rock Mechanics and Rock Engineering

ISSN

0723-2632

e-ISSN

1434-453X

Volume of the periodical

54

Issue of the periodical within the volume

8

Country of publishing house

AT - AUSTRIA

Number of pages

25

Pages from-to

3847-3871

UT code for WoS article

000642047600002

EID of the result in the Scopus database

2-s2.0-85104336869