![]() ![]() The magnitudes and directions of the three principal strains in FLAC3D are deduced. Large irregular plastic zones for elastoplastic and original transverse isotropic models are overcome. And overload test was performed to calculate the safety factor, showing good effect. The whole process of continuous deterioration and expansion of damaged zone caused by unloading stress was studied. Moreover, the proposed model was also applied to investigate the slope excavation of Dagangshan Hydropower Station in China. ![]() The simulation results match well with experiments by predecessors, which demonstrates validity and feasibility of this new method. The crack propagation path and lap mode of rock specimen under three groups of tension-shear test conditions were studied and analysed. The dynamic strike, dip direction and dip angle of the smeared crack surface were deduced in FLAC 3D, and the synergistic relationship between the elastic modulus, shear modulus and tensile damage was quantified, through which programming was realized the first time using finite difference method. The maximum tensile strain theory was defined as the damage criterion of mesoscopic element to establish degeneration principles. ![]() Rotating smeared crack model is adopted, which means the smeared crack surface inside element changes every moment with the redistribution of stress. By improving the original transverse isotropic constitutive model of FLAC 3D and secondary development, the theory of original smeared crack model was modified and introduced into the simulation of progressive fracture of rock mass from the research focus of concrete. ![]()
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