氟化乙丙烯薄膜单轴拉伸力学性能试验

上海交通大学学报（自然版） ›› 2016, Vol. 50 ›› Issue (01): 72-77.

氟化乙丙烯薄膜单轴拉伸力学性能试验

李纯,陈务军,何世赞

（上海交通大学空间结构研究中心，上海 200240）

收稿日期:2015-01-05 出版日期:2016-01-29 发布日期:2016-01-29
基金资助:
国家自然科学基金（51478264, 51278299）资助项目

Experimental Study of Uniaxial Tensile Mechanical Properties of Fluorinated Ethylene Propylene Foils

LI Chun,CHEN Wujun,HE Shizan

(Space Structures Research Centre, Shanghai Jiaotong University, Shanghai 200240, China)

Received:2015-01-05 Online:2016-01-29 Published:2016-01-29

摘要/Abstract

摘要： 摘要：对150 μm厚氟化乙丙烯（FEP）薄膜沿MD和TD方向裁取的试样进行4种拉伸速度的单轴拉伸试验，得到相应的屈服强度、抗拉强度和断裂伸长率，并给出以应变速率为变量的线性拟合公式；进行3种拉伸应力的循环拉伸试验，得到每循环割线模量及残余应变；进行3种应力水平下的徐变试验，分析徐变发展趋势.结果表明：FEP薄膜的屈服强度、抗拉强度和断裂伸长率都随着应变速率的增大而增大；随着循环次数的增加，循环割线模量及残余应变趋于稳定；拉伸应力9 MPa时材料产生明显徐变.试验结果对FEP薄膜工程设计应用具有参考价值. 关键词：氟化乙丙烯薄膜；拉伸试验；循环拉伸；徐变试验中图分类号： TU 502.6文献标志码： A

Abstract: Abstract： A series of uniaxial mechanical property tests were conducted for the FEP foils（thickness：150 μm）and the specimens were cut from foils along the machine direction（MD）. The transverse direction（TD）. The yield strength, the tensile strength and the elongation at break were obtained from the uniaxial tensile tests by using four kinds of tensile speed. The linear fitting formulas through using the tensile strain rate. The variable were proposed. The analysis of the secant modulus and the residual strain per cycle were obtained via the uniaxial cyclic tensile tests by using three values of cycle stress. The analysis of creep development was conducted from the results of the creep tests by using three kinds of stresses. The results show that the yield strength, the tensile strength, the elongation at break of the FEP foils material are increased with the increase of tensile strain rate. The secant modulus and the residual strain remain stable with the increase of cyclic times. The large creep is observed in the stress of 9 MPa. The result of the tests can provide valuable reference for practical membrane engineering design of FEP foils.

Key words: fluorinated ethylene propylene (FEP) foil, tensile test, cyclic tensile, creep test

李纯,陈务军,何世赞. 氟化乙丙烯薄膜单轴拉伸力学性能试验[J]. 上海交通大学学报（自然版）, 2016, 50(01): 72-77.

LI Chun,CHEN Wujun,HE Shizan. Experimental Study of Uniaxial Tensile Mechanical Properties of Fluorinated Ethylene Propylene Foils[J]. Journal of Shanghai Jiaotong University, 2016, 50(01): 72-77.

参考文献

［1］GANDO A, GANDO Y, HANAKAGO H, et al. Measurement of the doubleβ decay halflife of 136 Xe with the KamLANDZen experiment［J］. Physical Review C, 2012, 85(4): 045504. ［2］陈务军. 膜结构工程设计［M］. 北京: 中国建筑工业出版社, 2004. ［3］GB/T1040.3—2006,塑料拉伸性能的测定第3部分: 薄膜和薄片的试验条件［S］. ［4］ASTM Designation D 882—02, Standard test method for tensile properties of plastics［S］. ［5］陈务军,唐雅芳,赵大鹏，等. 建筑膜材力学性能与焊接缝合性能试验研究［J］. 空间结构, 2007, 13（1）:3744. CHEN Wujun, TANG Yafang, ZHAO Dapeng, et al. Experiments on the mechanical properties and the welded seam properties of architectural membranes［J］. Spatial Structures, 2007, 13(1):3744. ［6］陈务军，唐雅芳，任小强，等. ETFE气囊膜形态, 结构特性与材料性能试验［J］. 建筑科学与工程学报, 2007, 24(3): 1318. CHEN Wujun, TANG Yafang, REN Xiaoqiang, et al. ETFE air cushion membrane configurations, structural performances and material properties experiments［J］. Journal of Architecture and Civil Engineering, 2007, 24(3): 1318. ［7］HU Jianhui, CHEN Wujun, LUO Renjie, et al. Uniaxial cyclic tensile mechanical properties of ethylene tetrafluoroethylene (ETFE) foils［J］. Construction and Building Materials, 2014, 63: 311319. ［8］HU Jianhui, CHEN Wujun, ZHAO Bing, et al. Uniaxial tensile mechanical properties and model parameters determination of ethylene tetrafluoroethylene (ETFE) foils［J］. Construction and Building Materials, 2015, 75: 200207. ［9］吴明儿, 慕仝, 刘建明. ETFE薄膜循环拉伸试验及徐变试验［J］. 建筑材料学报, 2008, 11(6): 690694. WU Minger, MU Tong, LIU Jianming. Cycle loading and creep tests of ETFE foil［J］. Journal of Building Materials, 2008, 11(6): 690694.