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- W4310531110 abstract "In deep underground engineering, flawed rocks are commonly subjected to hydrostatic confining pressure and dynamic loadings simultaneously. In this paper, dynamic triaxial tests are carried on sandstone specimen containing three parallel flaws under four hydrostatic confining pressures from 5.7 to 22.7 MPa and strain rates in range of 100-200 s-1, via a modified split Hopkinson pressure bar (SHPB) with confining systems. The results indicate that, the dynamic strength commonly increases with the strain rate, while the strain rate dependency of dynamic elastic modulus is not apparent. Moreover, as the hydrostatic confining pressure increases, the dynamic strength and elastic modulus generally feature a rising trend. The hydrostatic confining pressure occupies important roles on the failure pattern of the hydrostatically confined rocks. Under higher hydrostatic confining pressure, flawed rocks usually exhibit conjugated X-shape failure. In addition, the strain rate barely influences the main failure pattern but increases the fragment degree of rocks. The energy utilization efficiency is not sensitive to the hydrostatic confining pressure but features negative correlation with strain rate. Additionally, the strain rate will increase the energy dissipation density of flawed rocks." @default.
- W4310531110 created "2022-12-11" @default.
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- W4310531110 date "2022-12-01" @default.
- W4310531110 modified "2023-10-18" @default.
- W4310531110 title "Experimental investigation on the dynamic mechanical and failure behaviours of hydrostatic confined rocks containing three parallel flaws" @default.
- W4310531110 doi "https://doi.org/10.1201/9781003359142-51" @default.
- W4310531110 hasPublicationYear "2022" @default.
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