Hi FLAC3D community,
I’m attempting to simulate an actual triaxial test as a boundary value problem. I have created a cylinder respecting the 2V:1H ratio, as in the lab. I’m using the Norsand model. The boundary conditions are as follows: I have applied a normal stress to the zones at the circumference of the specimen. The movement of the top and bottom caps has been fixed perpendicular, allowing them to move freely in the two remaining directions. Although I’m using the fluid module, the fluid activation is turned off. The shearing phase occurs by moving the top and bottom caps with a constant displacement magnitude of 0.75e-6. When I reached 1.6% of axial strain, it became evident that my specimen was not experiencing uniform displacements. Instead, there is a concentration near the top and bottom corners. I’m aware that this is linked to the time I’ve allowed for the pore pressure to adjust to the strain increment. I’m expecting to achieve a uniform displacement contour in the radial direction but have been unsuccessful. Has anyone attempted simulating this or have any advice?
see attached file
Master_txx.dat (5.9 KB)
Grid_building.dat (2.0 KB)
