Fracturing and indirect tensile strength of brittle and ductile rocks

Erarslan, N. and Ghamgosar, M. (2014). Fracturing and indirect tensile strength of brittle and ductile rocks. In: R. Alejano, Áurea Perucho, Claudio Olalla and Rafael Jiménez, Rock Engineering and Rock Mechanics: Structures in and on Rock Masses. 2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014, Vigo, Spain, (321-324). 26-28 May 2014.

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Name Description MIMEType Size Downloads
Author Erarslan, N.
Ghamgosar, M.
Title of paper Fracturing and indirect tensile strength of brittle and ductile rocks
Conference name 2014 ISRM European Regional Symposium on Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, EUROCK 2014
Conference location Vigo, Spain
Conference dates 26-28 May 2014
Proceedings title Rock Engineering and Rock Mechanics: Structures in and on Rock Masses
Journal name Rock Engineering and Rock Mechanics: Structures in and on Rock Masses - Proceedings of EUROCK 2014, ISRM European Regional Symposium
Place of Publication London, United Kingdom
Publisher Taylor and Francis
Publication Year 2014
Year available 2014
Sub-type Fully published paper
Open Access Status
ISBN 9781138001497
9781315749525
Editor R. Alejano
Áurea Perucho
Claudio Olalla
Rafael Jiménez
Start page 321
End page 324
Total pages 4
Chapter number 49
Total chapters 254
Collection year 2015
Language eng
Abstract/Summary Rock failure can either be referred to as brittle, ductile, or at the brittle-ductile transition. Brittle failure is said to occur when the ability of the rock resist load decreases with increasing deformation. Brittle failure is associated with the materials that undergo little to no permanent deformation before failure and, depending on the test conditions, may occur suddenly and catastrophically. Ductile failure is said to occur when the material can sustain permanent deformation without losing its ability to resist loading (without failing). Brittleness may also be defined in terms of the ratio of specific elastic strain energy at the fracture to total specific strain energy at the fracture when a fracture is accompanied by plastic deformation, it is called a ductile fracture and when plastic deformation is absent it is called a brittle fracture. There are different definitions of rock brittleness in rock mechanics literature; however, Uniaxial Compressive Strength (UCS) and BrazilianTensile Strength (BTS) values are very important parameters to determine brittleness and ductility of rocks. Thus, the study presents the obtained BTS values of rocks by using standard Brazilian Jaws. As the Brazilian test has been criticized since it was initially proposed by ISRM, the aim of this study to investigate the accuracy of Brazilian jaws to determine the BTS values of brittle and ductile rocks separately. FRANC2D software was used to analyse the stress distribution at the centre of disk specimens by considering ductility and brittleness of rocks. Both experimental and numerical results showed that both BTS values and fracturing of rocks were found depended on the brittleness and ductility of rocks and accuracy of using the proposed standard Brazilian jaws may change depending on ductility and brittleness of rocks.
Keyword Diametral compression
Discs
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ

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