Finite element simulation on mechanical behavior of press-induced deformation of polycarbonate

Abstract

Mechanical behavior of press-induced deformation of polycarbonate at intermediate strain rates was studied by finite element method. Based on DSGZ constitutive model, polycarbonate cylindrical uniaxial compression finite element simulation was carried out. Effectiveness of the model for prediction of compressive mechanical response was verified by contrast of simulated and experimental results, calculation of prediction accuracy of model, and analyzation of multi-physics distribution in material after compressive deformation. Mechanical evolution rule of polycarbonate plates was obtained by simulation of the solid-state deformation in lateral restricted mode. The results show that simulated stress-strain curves is in good agreement with that acquired from experiment in the process of uniaxial compressive deformation, and stress-strain relationship in compressive elastic-plastic deformation can accurately predicted by DSGZ model relatively. The overall deformation of material was uniform, and the sensitivity of stress response to temperature is higher than that of strain rate in cylindrical uniaxial compressive deformation and press-induced deformed simulation. Mechanical behavior of press-induced deformation of polycarbonate was reflected by simulated results, which can be an important basis for engineering realization of press-induced deformation of polycarbonate, and provide strong support for material strengthening and its application in aircraft cockpit transparencies.

Keywords

• polycarbonate
• press-induced deformation
• constitutive model
• finite element