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#Using flac3d to model triaxial test for clay deformation series#
Maybe I can share some suggestions for you. Simulation of a true-triaxial deformation test on anisotropic gneiss using FLAC3D Shenghua Ye, Mehdi Sehizadeh, Mohammad Nasseri, and Paul Young Department of Civil Engineering, University of Toronto, Toronto, Canada () A series of true-triaxial experiments have been carried out at the University of Toronto’s Rock Fracture Dynamics Laboratory. Example applications: general soil or rock mechanics for slope stability and. I don't known whether you have solved this problem, i also face the same problem when use modified cam clay model in FlAC3D. Vermeer and deBorst (1984), for example, report laboratory test results for sand and concrete that match well with the Mohr-Coulomb criterion. To calibrate the parameter, which controls the yield dependence on the third stress invariant, experimental results obtained from a true triaxial (cubical) test are necessary. The Mohr-Coulomb model is the conventional model used to represent shear yielding in soils and rocks. unconfined compression test often underestimates the in situ undrained strength of a saturated clay be cause of the effects of sample disturbance, dis continuities, and sand partings. represents the curvature of the cap part of the yield surface and can be calibrated from a number of triaxial tests at high confining pressures (on the “wet” side of critical state). is the ratio of the shear stress,, to the pressure stress,, at critical state and can be obtained from the stress values when the material has become perfectly plastic (critical state). The triaxial compression tests allow the calibration of the yield parameters and. Again, the stress and strain in the direction of loading are recorded, together with the lateral strain so that the correct volume changes can be calibrated. Several tests covering the range of confining pressures of interest are usually performed. Triaxial compression experiments are performed using a standard triaxial machine where a fixed confining pressure is maintained while the differential stress is applied.