A method for estimating the fracture toughness of rocks

Qingyu Yao, Haihui Ruan, Liangchi Zhang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


A fast measurement of the fracture toughness of rocks is very much required by the mining and geological industry. This paper proposes a simple rock chipping method to determine the fracture toughness of rocks using a simple experimental setup. The chipping was conducted by indenting a rock piece at a spot near its edge using a sharp indenter. The shape of the rock sample is not important provided that the chipping edge is approximately straight, and that the indenting and chipping surfaces are roughly planar and perpendicular to each other. A series of chipping tests were carried out on four kinds of sandstones, the Bauhaus, Littlewood, Appin and Pyrmont produced in New South Wales of Australia. A 30kN load cell mounted on a universal Instron machine was used to perform the indentation. Pyramidal and conical indenters were used to understand the geometry effect of the indenters on the fracture behaviour of the rocks.
Original languageEnglish
Title of host publicationAdvances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012
PublisherNational Committee on Applied Mechanics
Number of pages10
ISBN (Print)9781922107619
Publication statusPublished - 1 Jan 2012
Externally publishedYes
Event7th Australasian Congress on Applied Mechanics, ACAM 2012 - Adelaide, SA, Australia
Duration: 9 Dec 201212 Dec 2012


Conference7th Australasian Congress on Applied Mechanics, ACAM 2012
CityAdelaide, SA


  • Indenting distance
  • Peak force
  • Rock
  • Toughness

ASJC Scopus subject areas

  • Mechanics of Materials

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