PTFE薄膜横向拉伸变形行为及其有限元分析  

Finite element analysis and experimental study on transverse stretching deformation behavior of biaxially stretched PTFE membrane

作　　者：郭玉海[1] 张华鹏[1] 王永军[1] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《化工学报》2008年第5期1315-1319,共5页CIESC Journal

基　　金：长江学者和创新团队发展计划资助项目(IRT0654);浙江省科技攻关项目(2007C21129);浙江理工大学校启动资金项目(0601290-Y);浙江省自然科学基金项目(Y407269)~~

摘　　要：采用分步位移加载和弹塑性材料模型,在应力应变曲线及材料基本参数的基础上,对PTFE薄膜横向拉伸过程进行了实验研究和有限元分析,得到了均匀横向拉伸和横向拉伸过程中薄膜的应力和位移变形分布状态及规律。实验和模拟结果表明,由于PTFE薄膜在低应力下易发生塑性变形,在横向拉伸过程中存在明显的应力和位移分布不匀,并导致薄膜在面内发生弓曲变形。研究结果对通过扩幅实现双向拉伸薄膜的非均匀变形控制具有参考价值。The deformation behavior of equally transverse stretching and consecutively tenter transverse stretching of polytetrafluoroethylene （PTFE） membrane after being longitudinally stretched were experimentally measured and simulated with finite element analysis （FEA）, and the stress and displacement distributions of the PTFE membrane were obtained based on the FEA analysis. The results showed that there were obvious non-uniform deformations in the transversely stretched PTFE membrane due to the plastic deformation at small strain levels, which also led to the bowing phenomenon.

关 键 词：PTFE薄膜 横向拉伸 有限元分析 形变 

分 类 号：TQ028.8[化学工程]