TECHNICAL NOTE ON THE INITIAL NON-LINEARITY OF COMPRESSIVE STRESS-STRAIN CURVES FOR INTACT ROCK

Abstract

The unconfined compression load-displacement curves for rock samples were described. A series of uniaxial compression tests was performed to implement and compare two different methods of deformation measurements. Stress-strain plots corresponding to these different methods were compared with numerical results. Results concluded the nonlinear effects of the interfaces between the loading platen and the sample or sample and the indenter.