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- W2013146588 abstract "The effects of confining pressure/normal stress and temperature on shear fracture energy of rocks have been studied with intact samples of sandstones. Both the nominal values of the shear fracture energy Gnom, calculated using triaxial data at constant confining pressure and the inferred values G for the loading path satisfying constant normal stress show that they at first increase then decrease with increasing confining pressure/normal stress and they decrease with increasing temperature. For Ruhr-sandstone, there is a maximum value of Gnom 6.2 × 104 Jm−2 at 50 MPa confining pressure and maximum G 2.7 × 104 Jm−2 at 140–180 MPa normal stress respectively. They tend to zero at the confining pressure of 300 MPa and the normal stress of 600 MPa; for Bunt-sandstone, the maximum value of Gnom and G are 0.69 × 104 Jm−2 at 20–30 MPa confining pressure and 0.45 × 104 Jm−2 at 60–70 MPa normal stress respectively. They tend to zero at confining pressure of 20–30 MPa and normal stress of 150 MPa. The fracture energy mainly depends on the stress drop during the breakdown process at both different pressures and temperatures and in different loading paths." @default.
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- W2013146588 date "1990-01-01" @default.
- W2013146588 modified "2023-10-18" @default.
- W2013146588 title "Shear fracture energy of rock at high pressure and high temperature" @default.
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- W2013146588 doi "https://doi.org/10.1016/0079-1946(89)90015-3" @default.
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