Show simple item record

dc.contributor.author
Ghouli, Saeid
dc.contributor.author
Bahrami, Bahador
dc.contributor.author
Ayatollahi, Majid R.
dc.contributor.author
Driesner, Thomas
dc.contributor.author
Nejati, Morteza
dc.date.accessioned
2021-08-17T12:12:47Z
dc.date.available
2021-07-15T10:33:14Z
dc.date.available
2021-07-21T07:38:36Z
dc.date.available
2021-08-17T12:12:47Z
dc.date.issued
2021-08
dc.identifier.issn
1434-453X
dc.identifier.issn
0723-2632
dc.identifier.other
10.1007/s00603-021-02468-1
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/494958
dc.identifier.doi
10.3929/ethz-b-000494958
dc.description.abstract
This article discusses the scale dependence of the mode I fracture toughness of rocks measured via the semi-circular bend (SCB) test. An extensive set of experiments is conducted to scrutinise the fracture toughness variations with size for three distinct rock types with radii ranging from 25 to 300 mm. The lengths of the fracture process zone (FPZ) for different sample sizes are measured using the digital image correlation (DIC) technique. A theoretical model is also established that relates the value of fracture toughness to the sample size. This theorem is based on the strip-yield model to estimate the length of FPZ, and the energy release rate concept to relate the FPZ length to the fracture toughness. This theoretical model does not rely on any experimental-based curve-fitting parameter, but only on the tensile strength of the rock type as well as the fracture toughness at a specific sample size. The size effects predicted by the theoretical model is in a good agreement with the experimental data on both fracture toughness and the FPZ length. Finally, theoretical correction factors are introduced for various geometrical configurations of the SCB specimen, using which a scale-independent mode I fracture toughness of the rock material can be estimated from the results of experiments performed on small samples.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Semi-circular bend (SCB)
en_US
dc.subject
Size effect
en_US
dc.subject
Rock fracture toughness
en_US
dc.subject
Fracture process zone (FPZ)
en_US
dc.subject
Digital image correlation (DIC)
en_US
dc.title
Introduction of a Scaling Factor for Fracture Toughness Measurement of Rocks Using the Semi-circular Bend Test
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-05-12
ethz.journal.title
Rock Mechanics and Rock Engineering
ethz.journal.volume
54
en_US
ethz.journal.issue
8
en_US
ethz.journal.abbreviated
Rock Mech Rock Eng
ethz.pages.start
4041
en_US
ethz.pages.end
4058
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Wien
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::08822 - Driesner, Thomas (Tit.-Prof.)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02725 - Institut für Geochemie und Petrologie / Institute of Geochemistry and Petrology::08822 - Driesner, Thomas (Tit.-Prof.)
ethz.date.deposited
2021-07-15T10:34:39Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-08-17T12:12:53Z
ethz.rosetta.lastUpdated
2022-03-29T11:14:26Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Introduction%20of%20a%20Scaling%20Factor%20for%20Fracture%20Toughness%20Measurement%20of%20Rocks%20Using%20the%20Semi-circular%20Bend%20Test&rft.jtitle=Rock%20Mechanics%20and%20Rock%20Engineering&rft.date=2021-08&rft.volume=54&rft.issue=8&rft.spage=4041&rft.epage=4058&rft.issn=1434-453X&0723-2632&rft.au=Ghouli,%20Saeid&Bahrami,%20Bahador&Ayatollahi,%20Majid%20R.&Driesner,%20Thomas&Nejati,%20Morteza&rft.genre=article&rft_id=info:doi/10.1007/s00603-021-02468-1&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record