Computer-aided Design And Tensile Properties Of Three-way Fabrics

As science and technology are increasingly closely related to people's lives,the convenience and rapidness of fabric structure design through software programs has attracted more and more attention.The triaxial fabric is widely used in textile materials because of its advantages such as high structural stability,good mechanical properties such as stretching and tearing,and is widely used in textile materials.In this paper,the structure of the triaxial fabric is studied,and the plane design of fabric is carried out by code program,which lays the foudation for fabric modeling.The tensile property is the most basic mechanical property of fabric.The finite element simulation technique is used to study the tensile property of the triaxial fabric.At the same time,the tensile properties of fabric models with different fabrics,different structures and different yarn densities were compared.The finite element model analysis method can reduce the actual process of trial weaving,sample making and testing,and effectively simulate and analyze the tensile properties of the fabric.First,the article studies the structure of the triaxial fabric,using flat webbing for physical weaving of different weaves and different widths,exploring the positional relationship of the feature points in the fabric structure,and deducing the triaxial fabric coverage factor based on the principle of the woven fabric coverage factor.Calculation formula.Secondly,the paper uses Python language to design the structure software of the triaxial fabric,and calculates the circulation mode and covering coefficient of warp and weft in fabric respectively.In addition,Python and Py Qt5 are combined to design software interface and software code.The software program can design fabric structure diagrams of different yarn widths,different warp groups and different warp colors.At the same time,using the code to arrange the yarn position can reduce the inaccuracy of manual weaving.Finally,based on the output results of the software program,the bending path of the yarn in the fabric is calculated according to the position coordinates,and the fabric model is established by the modeling software,which lays the foundation of the triaxial physical model for the finite element fabric simulation.Then,in the ABAQUS finite element software,perform the microscopic tensile analysis of the fabric unit cell model and the macroscopic tensile analysis of the overall fabric model,and compare the stress distributions in the warp and weft stretching of the two fabric models,and Compare the stress-strain curves of the two model structures.On the basis of the finite element unit cell model,the tensile properties of plain weave and triaxial weave were compared.The results found that the meso-level model can accurately reflect the stress distribution of the fabric during the stretching process.The finer the mesh,the more in line with the actual results;the comparison of the same yarn density and different organizational structures on the tensile properties of the fabric Certain influence,the tensile performance simulation result of triaxial fabric is better than plain weave fabric;comparing the structure of triaxial fabric with the same weave and different yarn fineness,it is found that in triaxial fabric,the higher the yarn density,the stretch of fabric The better the performance;comparing the same yarn density and different triaxial fabric structure,it is found that the increase in the number of warp yarns will affect the tensile mechanical properties of the fabric.The increase in the number of yarns will reduce the voids of the fabric and the tensile performance of the fabric it is better.