Analyse et simulation de la déformation de films polymères de décoration au cours de leur mise en forme

摘要

The simulation of the forming process of polymer films for thermoforming process has several objectives. It allows to determine feasibility or the conditions of this feasibility and above all it allows to know the thickness distribution of the deformed film of decoration. Simulations avoid the expensive experimental studies by test-errors. The work presented in this document relates to the two steps of the thermoforming of polymer films. The first step consists in heating the sheet using infrared lamps and the second step consists in forming the sheet into a mold. The contributions of this work are as follows: development of numerical modelling of the thermoforming process for non-isothermal viscoelastic sheet under large strains. Simulation of the heating step with taken into account the heterogeneous radiative heat transfer due to the shape of the tools. Finally, a set of simulations of forming processes was realized and the results of the simulations are compared to the results of experiments.