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| EXPERIMENTAL STUDIES AND CONSTITUTIVE MODEL OF ELASTOPLASTIC MECHANICAL BEHAVIORS OF SANDSTONE WITH HYDRO-PHYSICOCHEMICAL INFLUENCING EFFECTS |
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Abstract A series of uniaxial compression tests and computerized tomography(CT) scanning tests on dry，saturated sandstones，and the sandstones with hydro-physicochemical influencing effects due to the circulating flow of distilled water and different hydro-chemical solutions are conducted. The corresponding complete stress-strain curves and CT scanning results are obtained. The hydrophysical and hydrochemical influencing effects on the elastoplastic mechanical behaviors of sandstone，such as stress-strain relationship，elastic modulus，peak strength and residual strength are derived. The hydrophysical and hydrochemical influencing mechanisms of water-sandstone interaction are studied. The hydro-physicochemical damages of sandstones are analyzed based on the CT scanning results. The modified Duncan model is used to describe the mechanical behaviors of sandstones with different hydro-physicochemical influencing effects. This study has a useful reference to the theoretical and applied research in the field of water-rock interaction.
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Received: 11 June 2008
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WANG Hongjian1, 2, 3, 4, YIN Bohao1, WANG Yongbo1, XU Xianlei4, ZHAO Shankun3*, ZHAO Fei1,SHI Xiaoshan2, WANG Guozhu5. Fluid-solid coupling mechanisms in the evolution of hydraulic fracture networks in large-scale true triaxial tight sandstone[J]. , 2026, 45(6): 1723-1739. |
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