During the stretch blow moulding (SBM) process of polyethylene terephthalate (PET) bottle, high viscous dissipation generates self heating phenomena. Since the influence of temperature on polymer’s behavior is important, it is necessary to evaluate the self heating values in order to manage accurately the simulation of the process. An anisotropic visco-hyperelastic model has been developed to manage numerical simulations of free blowing. The model takes into account the anisotropy and the effect of the temperature. It has been computed in a user-interface VUMAT implemented in the software ABAQUS/Explicit. The identification of the model is based on experimental data of biaxial tension tests. We identified the characteristics taking into account the self-heating effect by a semi analytical process followed by an adjustment using finite element. For sake of validation, PET preforms have been blown from different initial temperature and followed using a thermal camera. The increase of temperature is measured by comparing initial temperature and final temperature. Comparison between the experimental and numerical simulations is discussed and influence of initial temperature or blowing pressure is highlighted in a large numerical investigation.

在聚对苯二甲酸乙二酯（PET）瓶的拉伸吹塑（SBM）过程中，高粘性耗散会产生自热现象。由于温度对聚合物性能的影响很重要，因此有必要评估自热值，以准确管理过程模拟。已经开发出各向异性的粘-超弹性模型来管理自由吹气的数值模拟。该模型考虑了各向异性和温度的影响。它已在由ABAQUS / Explicit软件实现的用户界面VUMAT中进行了计算。模型的识别是基于双轴拉伸试验的实验数据。我们通过半分析过程考虑了自热效应，然后使用有限元进行调整，从而确定了特性。为了验证起见，已从不同的初始温度吹塑PET瓶坯，然后使用热像仪进行吹塑。通过比较初始温度和最终温度来测量温度的升高。讨论了实验模拟和数值模拟之间的比较，并在大量的数值研究中强调了初始温度或吹塑压力的影响。