Abstract
Abstract This study employed the finite element method to investigate the biaxial stretching deformation mechanism of polyamide 6 (PA6) Film. First, the PA6 film was subjected to biaxial stretching experiments under various conditions. Then, a three-dimensional finite element model of PA6 film was established. The biaxial stretching experiments of PA6 films under various conditions were simulated by the established finite element model. The results show that the biaxial stretching of the films under various conditions exhibited a transition from elastic deformation to plastic deformation. Meanwhile, as the stretching ratio increases, the more uniform stress and strain distribution on the film surface can be found in the stress and strain contour diagrams. The stress and strain distributions were found to be largely consistent under various annealing temperatures. However, lower stretching rates resulted in higher internal stress intensity, making the films more resistant to biaxial stretching. The findings of this study provide a theoretical reference for a deeper understanding of the deformation mechanisms of PA6 films during the biaxial stretching process.
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