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dc.contributor.authorKuruppu, Mahinda
dc.contributor.authorFunatsu, T.
dc.contributor.editorA. Kotousov, R. Das, S. Wildy
dc.identifier.citationKuruppu, Mahinda and Funatsu, Takahiro. 2012. Development of a standard method for determining the plane strain fracture toughness of rock, in Kotousov, A. and Das, R. and Wildy, S. (ed), 7th Australasian Congress on Applied Mechanics (ACAM7), Dec 9-12 2012, pp. 877-883. Adelaide, SA: Engineers Australia.

A number of standard methods have been proposed to determine the Mode I plane strain fracture toughness of rock. The semi-circular bend (SCB) specimen has been widely used for fracture toughness determination of geomaterials owing to inherent favourable properties such as its simplicity, minimal requirement of machining and the convenience of testing. However, measurements of Mode I fracture toughness using SCB specimen have shown variability with specimen size. The minimum size requirements suggested by many theories are usually too large for practical applications. This research suggests an approximate, but relatively easily applied method, to satisfy the minimum size requirement. Fracture toughness of Kimachi sandstone was determined using the SCB specimen. By testing specimens of varying size, it was confirmed that the apparent fracture toughness increases with the specimen size. The trend line of the apparent fracture toughness displayed eventual stabilisation giving a value that can be considered as specimen size-corrected fracture toughness. This paper describes the method of determining the SCB specimen size-corrected fracture toughness and also highlights the advantages of using the SCB method over the other suggested standard methods.

dc.publisherEngineers Australia
dc.subjectbrittle fracture
dc.subjecttoughness testing
dc.subjectfracture mechanics
dc.subjectstress intensity factor
dc.titleDevelopment of a standard method for determining the plane strain fracture toughness of rock
dc.typeConference Paper
dcterms.source.titleAdvances in Applied Mechanics Research
dcterms.source.seriesAdvances in Applied Mechanics Research
dcterms.source.conference7th Australasian Congress on Applied Mechanics
dcterms.source.conference-start-dateDec 9 2012
dcterms.source.conferencelocationAdelaide, SA
curtin.accessStatusFulltext not available

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