Based on shear induces polymer orientation and increases its equilibrium melting temperature

a Nakamura equation based shear-induced crystallization kinetics model was presented. A model for injection molding simulation was also established

in which the influence of crystallization was considered into WLF-Cross viscosity coefficient. Three-dimensional shear-induced crystallization behavior was simulated by an improved finite volume method

which coupled flow field

melt pressure

temperature

induction time index and crystallinity. Experimental results show that the proposed method can clearly simulate the three-dimensional “fountain” flow behavior and the three-layer “skin-core” crystallization structure during injection molding process. The simulated shear-induction time index results and crystallinity results agree well with the theoretical and experimental results.