Simulation method for nonlinear loading and unloading hysteresis stiffness of rubber material

The invention relates to the field of performance analysis of rubber materials, and particularly provides a simulation method for nonlinear loading and unloading hysteresis stiffness of a rubber material, which comprises the following steps: S1, carrying out an experimental test of basic mechanics on the rubber material to obtain original experimental data of the rubber material; s2, acquiring loading super-elastic constitutive parameters, unloading super-elastic constitutive parameters and plastic constitutive parameters of the rubber material according to the original experimental data in the step S1; s3, when the material super-elastic constitutive parameters are created, temperature dependent data are selected, and different virtual temperature settings are carried out on loading of the super-elastic constitutive parameters and unloading of the super-elastic constitutive parameters; s4, in the load setting step, a temperature preset field is created, and proper super-elastic constitutive parameters are ca