芳纶平纹织物单纱抽拔力学性能分析  

Mechanical property analysis of single yarn pull-out from aramid plain woven fabrics

作　　者：马莹 陈奡 胡月鹏 潘俊 胡瀚杰 禄盛 MA Ying;CHEN Ao;HU Yuepeng;PAN Jun;HU Hanjie;LU Sheng(School of Advanced Manufacturing Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Institute for Advanced Study,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;The Green Aerotechnics Research Institute,Chongqing Jiaotong University,Chongqing 401120,China)

机构地区：[1]重庆邮电大学先进制造工程学院,重庆400065 [2]重庆邮电大学高等教育研究院,重庆400065 [3]重庆交通大学绿色航空技术研究院,重庆401120

出　　处：《纺织学报》2024年第3期58-64,共7页Journal of Textile Research

基　　金：国家自然科学基金青年科学基金项目(12002070);重庆市留学人员回国创业创新项目(cx2018126);重庆市自然科学基金面上项目(2022NSCQ-MSX3803)。

摘　　要：为探究芳纶平纹织物抽拔力峰值和横向预张力受各因素影响机制和变化规律,通过在电子万能试验机上加装自主设计的快速对中夹具和力传感器,进行了以横向预张力、抽拔速度、试样规格和纱线类型为变量的单纱抽拔实验。结果表明:抽拔力和横向预张力在抽拔过程中发生同频率零相位差的震荡下降,抽拔力峰值与抽拔纱线的交织点数量、交织点处的张力和变形程度呈正比关系;当初始横向预张力从100 N增加至400 N时,抽拔力峰值从5.63 N增加至10.58 N,横向预张力的上升值降低,下降值增加;当织物纵向长度从30 mm递增至110 mm时,抽拔力峰值增加,峰值增幅降低;抽拔过程中,横向预张力的上升值和下降值都随着织物纵向长度的增加而增加;纱线织造密度越小,预紧后的卷曲程度越高,抽拔力峰值越大。Objective Aramid fabrics show highly nonlinear and anisotropic behavior under ballistic impact,which brings immense challenges to the study of their mechanical properties.Hence,yarn pull-out,as an important mechanism for dissipating ballistic impact energy,is immerged as a popular research subject.However,in the existing researches,not enough attentions have been paid to the influence mechanism of different factors on the peak pull-out force and the change of pretension.In this paper,the effects of fabric pretension,pull-out speed,fabric dimension,and yarn type on peak pull-out force and pretension is systematically studied under laboratory conditions.Method The experimental setup is mainly composed of an automatic centering and fixture,especially designed for yarn pull-out test,attached to an electronic universal testing machine.Two load cells are a installed to measure the pull-out force and pretension.The experiment was divided into 5 groups with a total of 23 experiments.Each experiment is repeated for 4 times to minimize operation error.The change of pull-out force and pretension with respect to displacement is recorded under various conditions to analyze the influence mechanism of transverse pretension,pull-out speed,fabric length,fabric width,and yarn type on pull-out performance.Results The pull-out force and pretension oscillate sinusoidally with zero phase difference at the same frequency.The peak pull-out force is in direct proportion to the number of yarn cross-over,the tension at the yarn cross-over,and the deformation magnitude.When the initial transverse pretension equals to 100,200,300,and 400 N,the peak pull-out force is 5.63,7.30,8.85 and 10.58 N,respectively,the increase of transverse pretension was 3.37,2.92,2.22 and 1.87 N,respectively,and the decrease of transverse pretension was 15.02,17.37,19.55 and 21.94 N,respectively,during the pull-out.When the fabric length was increased from 30 mm to 110 mm,the peak pull-out force was increased from 2.04 N to 6.14 N,the rate of increase,however,was d

关 键 词：芳纶平纹织物 单纱抽拔 横向预张力 抽拔速度 抽拔力峰值 

分 类 号：TS101[轻工技术与工程—纺织工程]