ABSTRACT
In the current research work, the applicability of the three-dimensional implicit constitutive model, originally developed to validate the behavior of plain cement concrete, is explored to model the uniaxial stress-strain response of intact rocks. The model was developed for isotropic, homogeneous materials undergoing non-dissipative processes from a stress-free reference configuration. Since both rock and plain concrete exhibit similar quasi-brittle behavior, the model developed can also be used to predict the behavior of the intact rock material. To check the performance of the proposed model, its ability to capture the behavior of various compositions of Granite rock are examined using four experimental responses reported in the literature. The results indicate that the model replicates the observed behavior of intact granite rock quite accurately, with R 2 values of 0.98 for axial strain and 0.93 for radial strain. Overall, the results suggest that the proposed model effectively describes the behavior of intact granite rock for uniaxial behavior undergoing non-dissipative processes.
