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Keywords: scb specimenClose
Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0120
... ABSTRACT: This paper aims to experimentally investigate the heat-treated hot dry rock (HDR) samples in response to different loading rates in order to understand the mechanism of fracture initiation and propagation behavior in geothermal rock masses. Semi-circular Bend (SCB) specimens with...
Paper presented at the 49th U.S. Rock Mechanics/Geomechanics Symposium, June 28–July 1, 2015
Paper Number: ARMA-2015-598
... cracks of the CCNBD specimens were oriented at notch crack inclination angles, ß, of 0&#176:, 30&#176:, 45&#176:, and 70&#176: as part of the diametral testing procedure, whilst the SCB specimens were cut at the same ßs prior to conducting the three-point bending tests. The experimental...
Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-283
.... Specifically, the value for KII c obtained using the CCBD specimen is about 2.4 times higher than that obtained using the SCB specimen. These results cannot be interpreted using conventional fracture criteria such as the maximum tangential stress (MTS) criterion. However, it is shown that a generalized form...
Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0745
... method for the fracture toughness measurement of rock by the International Society for Rock Mechanics, ISRM (Ouchterlony 1988). The semi-circular bend (SCB) specimen (Chong & Kumppu 1984) is complimentary to the standard methods as depicted in Figure 1. All these specimens are core based and...
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