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Numerical simulation of shear fracture (mode II) in heterogeneous brittle rock
Luleå University of Technology.
Luleå University of Technology.
Center for Rock Instability & Seismicity Research, Northeastern University, Shenyang.
2004 (English)In: International Journal of Rock Mechanics And Mining Sciences, ISSN 1365-1609, E-ISSN 1873-4545, Vol. 41, no Suppl. 1, p. 14-19Article in journal (Refereed) Published
Abstract [en]

The fracture process of a heterogeneous brittle rock in the shear-box test is numerically investigated by means of the rock and tool interaction code (R-T2D). On the basis of the simulated results, the mode II fracture toughness is calculated, which is KIIC =7.72MPa root m, and the influence of heterogeneity and confinement on the formation and characteristics of shear fracture is discussed. It is found that with the confinement increasing, the fracture mechanisms in the shear-box test of heterogeneous brittle rock change from mixed tensile and shear failure but are dominated with tensile failure to dominant shear failure. It is concluded that the shear-box test under a confined condition is favourable for creating a condition for mode II fracture and a suitable method for measuring the mode II fracture toughness.

Place, publisher, year, edition, pages
2004. Vol. 41, no Suppl. 1, p. 14-19
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-3994DOI: 10.1016/j.ijrmms.2004.03.013Scopus ID: 2-s2.0-3042784262Local ID: 1d97c9d0-bc3f-11db-a46c-000ea68e967bOAI: oai:DiVA.org:ltu-3994DiVA, id: diva2:976856
Note
Validerad; 2004; Bibliografisk uppgift: Paper presented at the ISRM SINOROCK 2004 Symposium.; 20070214 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lindqvist, Per-Arne

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