NUMERICAL MODELING OF TRIAXIAL TEST USING FINITE DIFFERENCE METHOD WITH MOHR-COULOMB FAILURE CRITERION

• Main Author: Ibrahim Pinardi, Fahmi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/67760
• Institution: Institut Teknologi Bandung

Several parameters are needed in determining a slope or underground tunnel safety factor, including the internal friction angle and the cohesion value. The value of cohesion and friction angle can be obtained from several kinds of tests, one of which is the triaxial test. This triaxial test is carried out by applying confining pressure on the rock sample and then adding more pressure from the axial direction at a certain speed. In this study, numerical modeling of the triaxial test will be carried out using the finite difference method using the FLAC2D software based on the Mohr- Coulomb criteria. The data used are secondary data from Hoek and Brown's (1997) research for a very good sample class. The results obtained from this numerical modeling conclude that the triaxial test using FLAC2D cannot substitute laboratory tests, but this modeling can perform triaxial tests with post-collapse characteristics of rocks that can be determined. And it was also found that the greater the confining pressure applied to the model with perfect elastoplastic post-collapse characteristics, the stronger the rock will be and will not fail when the triaxial test is performed.