Multistage cellular automaton method for simulating dynamic recrystallization

The invention discloses a multistage cellular automaton method for simulating dynamic recrystallization. The method comprises a plurality of time steps, wherein the simulation process of each time step comprises the following steps of: (S1) enabling a strain increment to act on a mother cell space, and carrying out the full-field multistage crystal grain topological deformation simulation of the mother cell space; (S2) calculating the average dislocation density in the mother cell space and the dislocation density of each cell, when the average dislocation density is smaller than the criticaldislocation density [rho]cr, skipping to the step (S1), and carrying out simulation of the next time step; (S3) selecting a plurality of cells meeting dynamic recrystallization nucleation conditions from the mother cell space, and carrying out dynamic recrystallization nucleation simulation on the cells; and (S4) simulating the grain growth process in the mother cell space. According to the method, the actual recrystalliz