A STUDY ON CLASS II CHARACTERISTICS OF INADA GRANITE UNDER UNI-AXIAL COMPRESSIVE STRESS

Abstract

 The goal of this study is to assess the stress-strain characteristics of rocks that exhibit Class II characteristics. First, after considering the grain of a stone, the constant stress rate method was applied to perform a uniaxial compression test utilizing Inada granite with three different loading directions. The stress-strain curve was measured up to the peak stress, and the microscopic fracture mechanism was studied. Second, the loading direction was set to three types, and the complete stress-strain curve, including after the peak stress, was evaluated using the stress feedback method, and the anisotropy of the complete stress-strain curve was examined. The mechanical model that explains the fracture under uniaxial compressive stress has also been improved. Connecting the parallel spring models in series equivalent to four stages was found to explain the fracture behavior of granite relatively well. In addition, the outcomes of discussions on microscopic and macroscopic destruction of Inada granite were reported.