Couple stresses and the fracture of rock

Colin Atkinson, Ciprian D. Coman, Javier Aldazabal

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

An assessment is made here of the role played by the micropolar continuum theory on the cracked Brazilian disc test used for determining rock fracture toughness. By analytically solving the corresponding mixed boundary-value problems and employing singular-perturbation arguments, we provide closedform expressions for the energy release rate and the corresponding stress-intensity factors for both mode I and mode II loading. These theoretical results are augmented by a set of fracture toughness experiments on both sandstone and marble rocks. It is further shown that the morphology of the fracturing process in our centrally pre-cracked circular samples correlates very well with discrete element simulations.

LanguageEnglish
Article number20140120
Pages1-23
Number of pages23
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume373
Issue number2038
DOIs
Publication statusPublished - 28 Mar 2015
Externally publishedYes

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Couple Stress
Fracture Toughness
fracture strength
Fracture toughness
Rocks
rocks
Micropolar
Discrete Elements
Marble
Energy Release Rate
Mixed Boundary Value Problem
stress intensity factors
Energy release rate
fracturing
sandstones
Singular Perturbation
Stress Intensity Factor
Sandstone
boundary value problems
Stress intensity factors

Cite this

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Couple stresses and the fracture of rock. / Atkinson, Colin; Coman, Ciprian D.; Aldazabal, Javier.

In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 373, No. 2038, 20140120, 28.03.2015, p. 1-23.

Research output: Contribution to journalArticle

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