东华大学学报（英文版）2026，Vol.43Issue(4)：34-40,7.DOI:10.19884/j.1672-5220.202503014
双向拉伸聚酯膜张幅过程中弯曲畸变形成的数值模拟
Numerical Simulation of Bowing Distortion Formation of BOPET Film During Tentering Process
潘泓舟 1吴诗颀 1杨胜林1
作者信息
- 1. 东华大学 材料科学与工程学院,上海 201620
- 折叠
摘要
Abstract
When preparing biaxially oriented polyethylene terephthalate(BOPET)films through sequential biaxial stretching,bowing distortion occurs within the film plane,leading to inhomogeneous optical and mechanical properties between the edge and central regions of the films.This quality degradation renders the films unsuitable for optical applications.Considering that polyethylene terephthalate(PET)macromolecules are in a rubbery state and have crystalline physical crosslinking points when the film is stretched above its glass transition temperature Tg but below the melting point Tm,this study establishes a visco-hyperelastic model.The model parameters are obtained by numerically fitting the experimental results of uniaxial stretching and stress relaxation tests.These fittings yield the second-order coefficient of the Mooney-Rivlin polynomial(describing hyperelasticity)and the third-order coefficient of the Prony series(describing viscosity).Then,ANSYS finite element simulations of the tentering process of PET films are carried out with the isotropic elastic,the orthotropic elastic,the plastic,and the visco-hyperelastic material models,respectively.The simulated bowing distortion obtained from the visco-hyperelastic model shows better agreement with experimental results,demonstrating that this model can accurately capture the mechanical response behavior of PET films during biaxial stretching.关键词
双向拉伸聚酯膜/张幅加工/弯曲畸变/黏性-超弹模型/数值模拟Key words
biaxially oriented polyethylene terephthalate(BOPET)film/tentering process/bowing distortion/visco-hyperelastic model/numerical simulation分类
化学化工引用本文复制引用
潘泓舟,吴诗颀,杨胜林..双向拉伸聚酯膜张幅过程中弯曲畸变形成的数值模拟[J].东华大学学报（英文版）,2026,43(4):34-40,7.
