纬平针织物的力学性能有限元分析  

Finite element analysis of mechanical properties of weft plain knitted fabrics

作　　者：王旭辉 江文斌[1] 王金凤 WANG Xuhui;JIANG Wenbin;WANG Jinfeng(College of Textile Science and Engineering(International Silk College),Zhejiang Sci-Tech University,Hangzhou 310018,China;Key Laboratory of Industrial Textile Materials and Manufacturing Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018 [2]浙江理工大学浙江省产业纺织材料制备技术研究重点实验室,杭州310018

出　　处：《现代纺织技术》2024年第6期80-88,共9页Advanced Textile Technology

基　　金：纺织工程国家级教学示范中心项目(2020FZ03)。

摘　　要：针对用纱线进行纬平织物打样试织来预测织物力学性能和外观效果费时费力的问题,通过有限元分析对5种纬平针织物进行力学模拟测试实验。首先拍摄织物图像,选取19个特征点并获取坐标,用3次NURBS曲线对特征点进行拟合,构建微观单线圈中心曲线3D模型;根据该模型建立细观线圈单元模型,并通过衔接嵌套得到宏观织物模型。然后依次利用ABAQUS软件对单根纱线进行拉伸模拟实验,验证其在ABAQUS中赋予的材料属性正确性;对织物模型进行纵向拉伸和顶破实验,将材料属性在ABAQUS中赋予宏观织物模型,根据国家标准赋予分析步并提交分析。结果发现,模拟结果与实验结果基本一致。该分析方法的应用可降低企业的打样成本。To solve the problem of time-consuming and labor-intensive prediction of the mechanical properties and appearance effects of fabrics by enterprises through weft knitted plain weave and sampling,a method using ABAQUS finite element analysis to predict the mechanical properties of fabrics was proposed.Firstly,the yarn and fabric were photographed by using the Axio Cam Erc 5S Zeiss polarizing microscope at different zoom angles to obtain the geometric parameters of the fabric coil.19 feature points of the coil for three times of NURBS curve fitting were selected,the coil center curve was obtained,and the obtained geometric parameters were used to establish a fabric model.According to GB/T 3916—2013 Textiles-Yarns from Packages-Determination of Single-end Breaking Force and Elongation at Break Using Constant Rate of Extension(CRE)Tester,GB/T 3923.1—2013 Textiles-Tensile Properties of Fabrics-Part 1:Determination of Maximum Force and Elongation at Maximum Force Using the Strip Method,and GB/T 19976—2005 Textiles-Determination of Bursting Strength-Steel Ball Method,tensile and breaking tests were conducted on fabrics.Then,ABAQUS was used to perform finite element analysis and simulation on the constructed fabric model.The accuracy of the model is a prerequisite for the ideal results of finite element analysis.The similarity between the model and the fabric was measured by measuring the coordinates of 19 feature points.Firstly,the ABAQUS finite element analysis simulation results and experimental results of a single yarn were compared to analyze whether the material properties of the yarn are accurate.The comparison in figure proves the correctness of yarn material properties.Yarns are defined as a nonlinear elastic-plastic material,and material properties are determined by the tensile properties of the yarn.Under the premise of national testing standards,finite element models with different seed sizes and friction coefficients were analyzed and simulated.It was found that when the seed size was 0.1 and the fricti

关 键 词：有限元分析 ABAQUS 力学 图像处理 3D建模 

分 类 号：TS195.644[轻工技术与工程—纺织化学与染整工程]