On the role of fracture process zone size in specifying fracturing mechanism under dominant mode II loading

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F22%3A00551322" target="_blank" >RIV/67985831:_____/22:00551322 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0167844221002482?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0167844221002482?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tafmec.2021.103150" target="_blank" >10.1016/j.tafmec.2021.103150</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the role of fracture process zone size in specifying fracturing mechanism under dominant mode II loading

Popis výsledku v původním jazyce

The double-edge notched Brazilian disk (DNBD) test is used to investigate the failure mechanism of the polymeric material of polymethyl-methacrylate (PMMA) under dominant shear loading. It has previously been shown that DNBD is a simple and efficient test for measuring shear fracture toughness of rock materials. However, the results in this study show that a tension-based fracturing type prevails in the DNBD samples of PMMA. To predict the type of failure, the previously proposed fracture type (FT) criterion was employed. It is shown that the FT criterion is able to accurately predict the fracturing type, the fracture initiation load and the kink angle of the DNBD specimens. In addition, a comparison made between the results of the DNBD tests of PMMA and rock samples demonstrates the main reason for the different observed fracturing types. Thanks to a large fracture process zone in rocks, DNBD samples of rock materials fail with self-planar extension of cracks due to shear stresses. In contrast, due to small fracture process zone in PMMA, the DNBD samples of PMMA show tension-based failure mechanism with the formations of kinks. As the final discussion, an incremental finite element simulation is used to justify the reason behind the stable tension-based crack growth in the DNBD specimens of PMMA, and to predict the crack propagation trajectory.

Název v anglickém jazyce

On the role of fracture process zone size in specifying fracturing mechanism under dominant mode II loading

Popis výsledku anglicky

The double-edge notched Brazilian disk (DNBD) test is used to investigate the failure mechanism of the polymeric material of polymethyl-methacrylate (PMMA) under dominant shear loading. It has previously been shown that DNBD is a simple and efficient test for measuring shear fracture toughness of rock materials. However, the results in this study show that a tension-based fracturing type prevails in the DNBD samples of PMMA. To predict the type of failure, the previously proposed fracture type (FT) criterion was employed. It is shown that the FT criterion is able to accurately predict the fracturing type, the fracture initiation load and the kink angle of the DNBD specimens. In addition, a comparison made between the results of the DNBD tests of PMMA and rock samples demonstrates the main reason for the different observed fracturing types. Thanks to a large fracture process zone in rocks, DNBD samples of rock materials fail with self-planar extension of cracks due to shear stresses. In contrast, due to small fracture process zone in PMMA, the DNBD samples of PMMA show tension-based failure mechanism with the formations of kinks. As the final discussion, an incremental finite element simulation is used to justify the reason behind the stable tension-based crack growth in the DNBD specimens of PMMA, and to predict the crack propagation trajectory.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20701 - Environmental and geological engineering, geotechnics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Theoretical and Applied Fracture Mechanics

ISSN

0167-8442

e-ISSN

1872-7638

Svazek periodika

117

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

103150

Kód UT WoS článku

000730157800005

EID výsledku v databázi Scopus

2-s2.0-85119256089