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• W2945391010 endingPage "17" @default.
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• W2945391010 abstract "Chemical corrosion has a significant impact on the damage evolution behavior of rock. To investigate the mechanical damage evolution process of rock under a coupled chemical-mechanical (CM) condition, an improved statistical damage constitutive model was established using the Drucker-Prager (D-P) strength criterion and two-parameter Weibull distribution. The damage variable correction coefficient and chemical damage variable which was determined by porosity were also considered in the model. Moreover, a series of conventional triaxial compressive tests were carried out to investigate the mechanical properties of sandstone specimens under the effect of chemical corrosion. The relationship between rock mechanics properties and confining pressure was also explored to determine Weibull distribution parameters, including the shape parameter<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:mi>m</mml:mi></mml:math>and scale parameter<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:msub><mml:mrow><mml:mi>F</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msub></mml:math>. Then, the reliability of the damage constitutive model was verified based on experimental data. The results of this study are as follows: (i) the porosity of sandstone increased and the mechanical properties degraded after chemical corrosion; (ii) the relationships among the compressive strength, the peak axial strain, and confining pressures were linear, while the relationships among the elastic modulus, the residual strength, and confining pressures were exponential functions; and (iii) the improved statistical damage constitutive model was in good agreement with the testing curves with<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:msup><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>></mml:mo><mml:mn>0.98</mml:mn></mml:math>. It is hoped that the study can provide an alternative method to analyze the damage constitutive behavior of rock under a coupled chemical-mechanical condition." @default.
• W2945391010 created "2019-05-29" @default.
• W2945391010 creator A5002243838 @default.
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• W2945391010 date "2019-05-14" @default.
• W2945391010 modified "2023-10-18" @default.
• W2945391010 title "Mechanical Properties and Statistical Damage Constitutive Model of Rock under a Coupled Chemical-Mechanical Condition" @default.
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• W2945391010 doi "https://doi.org/10.1155/2019/7349584" @default.
• W2945391010 hasPublicationYear "2019" @default.
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