Influence of specimen size on fracture toughness of sandstone when using SCB specimen

Takahiro Funatsu, Mahinda Kuruppu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to investigate the effect of specimen size on the mode I fracture toughness using Semi-Circular Bend (SCB) specimen, we experimentally studied the fracture toughness using SCB and Short Rod (SR) specimens, both of which are International Society for Rock Mechanics (ISRM) suggested methods, for comparison. Fracture toughness of a strong sandstone having an unconfined compressive strength of 145 MPa was investigated. The test results revealed that the fracture toughness increased with specimen diameter and reached a limiting value. These experimental results further showed that the value of fracture toughness determined using SCB specimen is almost exactly the same as that using SR specimen, when the SCB specimen satisfies the minimum size requirement. However, SCB specimen being one without a chevron notch unlike SR specimen gives lower fracture toughness if the minimum size requirement is not satisfied.

Original languageEnglish
Title of host publication8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014
EditorsRaj Das, Sabu John
PublisherEngineers Australia
Pages588-595
Number of pages8
ISBN (Electronic)9781922107350
Publication statusPublished - Nov 1 2014
Event8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014 - Melbourne, Australia
Duration: Nov 25 2014Nov 26 2014

Publication series

Name8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014

Other

Other8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014
CountryAustralia
CityMelbourne
Period11/25/1411/26/14

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials

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  • Cite this

    Funatsu, T., & Kuruppu, M. (2014). Influence of specimen size on fracture toughness of sandstone when using SCB specimen. In R. Das, & S. John (Eds.), 8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014 (pp. 588-595). (8th Australasian Congress on Applied Mechanics, ACAM 2014, as Part of Engineers Australia Convention 2014). Engineers Australia.