损伤条件下聚氯乙烯涂层膜结构材料拉伸蠕变特性

发布时间：2018-03-28 00:08

本文选题：聚氯乙烯涂层膜结构材料　切入点：机织物　出处：《纺织学报》2017年10期

【摘要】：为进一步研究膜结构材料的力学特性,以机织聚氯乙烯涂层膜结构材料为研究对象,对其无损及单边切口试样的短期拉伸蠕变性能进行测试,分析切口尺寸及蠕变应力对蠕变性能的影响,并对其拉伸蠕变特性进行研究。实验结果表明:无损及切口试样的蠕变曲线均体现了初始蠕变和等速蠕变阶段的特征。在同等净切口蠕变应力条件下,切口试样的蠕变量小于无损试样,且随着切口尺寸的增加而降低。相对于Findley模型,4元件Burger模型较适合描述聚氯乙烯涂层膜结构材料的短期蠕变行为。同时,基于4元件Burger模型拟合系数,分析了蠕变应力及切口尺寸对初始蠕变应变、缓弹性变形和黏性变形的影响。
[Abstract]:In order to further study the mechanical properties of membrane structure materials, the creep properties of non-destructive and one-sided notch specimens were tested with woven polyvinyl chloride coated membrane structure material as the research object. The influence of notch size and creep stress on creep performance is analyzed. The experimental results show that the creep curves of both nondestructive and notched specimens reflect the characteristics of initial creep and constant creep. Under the condition of the same net notch creep stress, The creep amount of notch specimen is smaller than that of non-destructive specimen, and decreases with the increase of notch size. Compared with Findley model, Burger model with 4 elements is more suitable to describe the short-term creep behavior of PVC coated membrane materials. The effects of creep stress and notch size on the initial creep strain, slow elastic deformation and viscous deformation are analyzed based on the fitting coefficients of the four-element Burger model.
【作者单位】：湖南工程学院纺织服装学院;湖南省新型纤维面料及加工工程技术研究中心;
【基金】：湖南省科技厅科学研究项目(2013FJ3091)
【分类号】：TB302.3

【相似文献】