Based on the two-phase flow-induced crystallization model

according to the Avrami equation and the relationship between the nucleation rate and the first normal stress difference

spectral methods were used to calculate conformation tensor distribution function of amorphous phase and the orientation tensor distribution function of semi-crystalline phase

and then calculate the nucleation rate and crystallinity.The shear impact on crystallization rate of the system was predicted

and the evolution of the number of activation nucleation and crystal orientation was simulated.The results showed that the shearing actions had a significant impact on polymer crystallization kinetics

but the effect of shear on acceleration of polymer crystallization was limited

as the shear intensity increased

the effect on crystallization acceleration became no longer obvious.