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2015 | OriginalPaper | Buchkapitel

ISRM-Suggested Method for Determining the Mode I Static Fracture Toughness Using Semi-Circular Bend Specimen

verfasst von : M. D. Kuruppu, Y. Obara, M. R. Ayatollahi, K. P. Chong, T. Funatsu

Erschienen in: The ISRM Suggested Methods for Rock Characterization, Testing and Monitoring: 2007-2014

Verlag: Springer International Publishing

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Abstract

The International Society for Rock Mechanics has so far developed two standard methods for the determination of static fracture toughness of rock. They used three different core-based specimens and tests were to be performed on a typical laboratory compression or tension load frame. Another method to determine the mode I fracture toughness of rock using semi-circular bend specimen is herein presented. The specimen is semi-circular in shape and made from typical cores taken from the rock with any relative material directions noted. The specimens are tested in three-point bending using a laboratory compression test instrument. The failure load along with its dimensions is used to determine the fracture toughness. Most sedimentary rocks which are layered in structure may exhibit fracture properties that depend on the orientation and therefore measurements in more than one material direction may be necessary. The fracture toughness measurements are expected to yield a size-independent material property if certain minimum specimen size requirements are satisfied.

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Metadaten
Titel
ISRM-Suggested Method for Determining the Mode I Static Fracture Toughness Using Semi-Circular Bend Specimen
verfasst von
M. D. Kuruppu
Y. Obara
M. R. Ayatollahi
K. P. Chong
T. Funatsu
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-07713-0_8