PTFE薄膜横向拉伸变形行为及其有限元分析

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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 张华鹏 王永军

GUO Yuhai, ZHANG Huapeng, WANG Yongjun （Key Laboratory of Advanced Textile Material and Processing Technology, Ministry of Education, Zhejiang Sci Tech University, Hangzhou 310018, Zhejiang, China）

机构地区：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》 EI CAS CSCD 2008年第59卷第5期 1315-1319页,共5页

Journal of Chemical Industry and Engineering(China)

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）;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
PTFE membrane transverse stretching finite element analysis deformation
分 类 号：TQ028.8 [工业技术 > 化学工业 > 一般性问题 > 化工过程（物理过程及物理化学过程） > 分离过程]

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