Abstract
Rock and geomaterial specimens are usually extracted in circular cores. KIc derived from various core specimens is discussed. A newly developed fracture toughness test specimen, semi-circular in shape and contains an edge-crack, is elaborated. The fracture load and the fracture energy of a typical layered rock are measured with static tests, and the fracture toughness is determined using a stress intensity factor method, a compliance method and a J-integral based method. A minimum dimensional requirement is proposed for plane strain fracture toughness. Application of KIc in fragmentation modeling is illustrated. Mixed mode fracture specimen is also presented.
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Chong, K.P., Kuruppu, M.D., Kuszmaul, J.S. (1989). Fracture Toughness Determination of Rocks with Core-Based Specimens. In: Shah, S.P., Swartz, S.E. (eds) Fracture of Concrete and Rock. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3578-1_2
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DOI: https://doi.org/10.1007/978-1-4612-3578-1_2
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