涤纶高密双轴向经编增强PVC膜材粘弹性本构关系  

VISCOELASTIC CONSTITUTIVE RELATIONS OF HIGH STITCH DENSITY BIAXIAL WARP KNITTED FABRIC REINFORCED PVC

作　　者：侯佳佳 陈南梁[1,2] 蒋金华[1,2] 刘译雯 刘一凝 HOU Jia-jia;CHEN Nan-liang;JIANG Jin-hua;LIU Yi-wen(Key Laboratory of High Performance Fibers&Products,Ministry of Education,Donghua University,Shanghai 201620,China;College of Textile,Donghua University,Shanghai 201620,China)

机构地区：[1]高性能纤维及制品教育部重点实验室(B类),东华大学,上海201620 [2]东华大学纺织学院,上海201620

出　　处：《玻璃钢／复合材料》2019年第12期11-17,共7页Fiber Reinforced Plastics/Composites

基　　金：国家重点研发计划项目(2016YFB0303300);中央高校基地项目资助(2232019G-02);中国纺织工业联合会应用技术研究项目(J201507);国家大学生创新性实验项目(201810255002,sh201810255007)

摘　　要：对涤纶高密双轴向经编增强PVC膜材开展蠕变和应力松弛试验,探究拉伸速率和初始应力水平对材料粘弹性行为的作用规律,得到了松弛模量和蠕变柔量并绘制了其随时间变化的曲线。试验结果表明:涤纶高密双轴向经编增强PVC膜材存在典型的粘弹性行为;膜材在试验时长内已达到稳态松弛阶段;应力水平对PVC膜材的静态粘弹性有显著影响,尤其是蠕变现象随着初始应力水平的增大而出现堆积,而拉伸速率对试样的应力松弛行为起一定作用,但并不明显。通过比较可知,运用金属材料的时效蠕变与时效应力松弛关系原理推导的涤纶高密双轴向经编增强PVC膜材的蠕变和应力松弛长期转化关系式与试验结果存在偏差。In this paper,the creep and stress relaxation tests of high stitch density biaxial warp knitted fabric reinforced PVC were carried out,and the action law of tensile rate and initial stress level on the viscoelastic behavior of the material was investigated.The relaxation modulus and creep compliance were obtained and their curves as a function of time were drawn.The test results show that the high stitch density biaxial warp knitted fabric reinforced PVC has typical viscoelastic behavior;the membrane has reached the steady-state relaxation stage in the test period,and the stress level has a significant effect on the static viscoelasticity of the PVC membrane.In particular,the creep phenomenon occurs with the increase of the initial stress level,and the tensile rate plays a role in the stress relaxation behavior of the sample,but it is not obvious.By comparison,the long-term transformation relationship between creep and stress relaxation of high stitch density biaxial warp knitted fabric reinforced PVC deduced by the principle of aging creep and time effect force relaxation of metal materials is deviated from the experimental results.

关 键 词：增强PVC膜材 蠕变试验 应力松弛试验 粘弹性关系 

分 类 号：TB332[一般工业技术—材料科学与工程]