JOURNAL OF ROCK MECHANICS

JOURNAL OF ROCK MECHANICS

Comparison of the RHT and KCC Constitutive Models Performance Under static and Quasi-Static Loading Conditions for Jinping Marble

Document Type : Original Article

Authors
1 Department of Mining Engineering, Amirkabir University of Technology, Tehran, Iran
2 Faculty of Mining Engineering, Amirkabir University of Technology (Tehran Polytechnic)
Abstract
This study evaluates and compares the predictive performance of the RHT and KCC constitutive models in simulating the mechanical behavior of Jinping marble. First, the constitutive models, including the strength criteria and equations of state of each model, are briefly introduced. Subsequently, the model parameters required to predict the static behavior of marble under triaxial stress states are determined. Using both constitutive models, triaxial compression tests were numerically simulated at confining pressures of 5, 20, and 40 MPa, and the simulation results were compared with corresponding laboratory data. The results demonstrate that the RHT constitutive model provides better predictions of peak strength and pre-failure behavior than the KCC model. Accordingly, the RHT model was selected as the preferred constitutive formulation, and its post-failure response was further calibrated to improve agreement with the experimental observations. Accordingly, the RHT model was selected as the preferred constitutive formulation, and its post-failure response was further calibrated to improve agreement with the experimental observations.
Keywords
Subjects

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