A Construction Method of Complex Discrete Granular Model

Discrete granular model in a low stress state as well as retaining homogeneous porosity is the premise and foundation to obtain good results with particle flow method. AutoCAD is used as the processing software in which Polyline is used to render the scope of modeling and the 3dface is used to set delivery area of particles, then the improved expansion-particle method is prepared for generating boundary Wall and command flow of PFC2D automatically. Next, servo boundary is used to adjust stress state among particles and the porosity of model. Finally, the required numerical model will be obtained by using the arbitrary polygon material borderline to control and divide materials into parts. It is proved that a method with visualization is useful for the construction of complex discrete granular model. It can also be used in any 2D model building. What’s more, it is less overlap and none overflow after the damage of bond strength between particles.