ANALYSIS OF TRIAXIAL COMPRESSION FAILURE PROCESS OF SILTY CLAY BASED ON PFC3D
This paper investigates silty clay's deformation and failure evolution during triaxial test loading from a mi-croscopic perspective. Particle flow code (PFC) 3D software is used to simulate the triaxial shear test process, and the tiny evolution process of deformation and failure of silty clay is analyzed from the aspects of the particle displace-ment field, strong contact fabric change, strong contact force distribution, coordination number, bond fracture and so on. The results show that the shear band narrows with the increase of axial strain, and the displacement of particles in the middle of the sample is the largest when the axial strain is 10％. The coordination number in the late stage of the experiment gradually homogenized compared with that in the early stage. The bond fracture increases linearly with the increase of axial strain;the imperfect bond also grows with no bond fracture occurring in the initial stage of the test. The distribution function of the strong contact force increases significantly in the middle period of the exper-iment, and decreases gradually in the later period, following the lognormal distribution. The research results may pro-vide methods and references for macro and micro soil research.
万方数据
维普
