發(fā)布時間：2018-06-28 10:48

  本文選題：乙烯四氟乙烯共聚物薄膜 + 拉伸性能�。� 參考：《上海交通大學(xué)學(xué)報》2016年11期

【摘要】：對厚度為250μm的長條形ETFE(乙烯-四氟乙烯共聚物)薄膜試樣進(jìn)行了8種定速(拉伸速度由極慢的1mm/min到極快的500mm/min)單向拉伸試驗,得到了相應(yīng)的應(yīng)力應(yīng)變曲線、屈服強(qiáng)度、彈性模量等參數(shù)隨拉伸速率的變化規(guī)律.結(jié)果表明:ETFE薄膜的屈服強(qiáng)度和屈服應(yīng)變隨拉伸速率的增加而增加;ETFE薄膜的切線、割線彈性模量,以及基于應(yīng)變能和應(yīng)變余能的等效彈性模量隨拉伸速率的增加而增大,3種彈性模量之間的差值也隨拉伸速率的增加而增大.對上述應(yīng)力應(yīng)變曲線進(jìn)行分析,提出了ETFE膜材的黏塑性本構(gòu)模型(Peirce模型),并在有限元分析軟件ANSYS中進(jìn)行了數(shù)值模擬,其結(jié)果與試驗得出的應(yīng)力應(yīng)變曲線吻合較好.
[Abstract]:In this paper, the uniaxial tensile tests of the thin film samples of ethylene-tetrafluoroethylene copolymer (ETFE) with thickness of 250 渭 m have been carried out at eight constant speeds (from very slow 1mm/min to extremely fast 500mm/min). The corresponding stress-strain curves and yield strength have been obtained. The variation of elastic modulus and other parameters with tensile rate. The results show that the yield strength and yield strain increase with the increase of tensile rate. The difference between the equivalent elastic modulus based on strain energy and strain complementary energy increases with the increase of tensile rate, and the difference between the three elastic moduli increases with the increase of tensile rate. The above stress-strain curves are analyzed and the viscoplastic constitutive model (Peirce model) of ETFE membrane is put forward. The numerical simulation is carried out in the finite element analysis software ANSYS. The results are in good agreement with the stress-strain curves obtained from the test.
【作者單位】： 上海交通大學(xué)空間結(jié)構(gòu)研究中心;
【基金】：國家自然科學(xué)基金(51478264,51278299)資助項目
【分類號】：TU38;TU59
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本文編號：2077743