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Analysis Of Tensile Mechanical Properties Of Woven Fabrics Based On ABAQUS

Posted on:2020-05-29Degree:MasterType:Thesis
Country:ChinaCandidate:Q N LiuFull Text:PDF
GTID:2381330578964035Subject:Textile materials and textile design
Abstract/Summary:PDF Full Text Request
Tensile failure,as the most basic mechanical property of fabrics,directly affects the durability and fastness of fabrics,and is an important part of evaluating fabric quality indicators.At present,textile designers evaluate the tensile mechanical properties of fabrics mainly based on design experience and similar characteristics of similar fabrics,after material selection,trial spinning,trial weaving and fabric tensile failure test,it is analyzed whether the basic mechanical properties of the fabric meet the expected setting of the product,this process is not only complicated,long-term,and labor-intensive,but also full of unknown factors and uncertainties.Therefore,based on the finite element method,this thesis proposes a theoretical method for effectively predicting the tensile mechanical properties of fabrics,the method can reduce a series of complicated processes such as trial spinning,trial weaving,and post-treatment,according to the characteristics of the yarn material,the preliminary prediction of the basic mechanical properties of the fabric is realized,which achieves the purpose of saving resources,reducing costs and shortening the cycle.Firstly,through the measured fabric geometry parameters in this paper,TexGen professional textile modeling software and ABAQUS/CAE modeling tools were used to establish fabric unit cell model and fabric proportional model based on yarn level,laid the basis for theoretical analysis of fabric mechanical properties using finite element methods.Then,the ABAQUS finite element software was used to simulate the fabric drawing process;and fabric tensile strength test was carried out to verify the validity of the theoretical numerical results.The advantages of the two models in simulating the tensile mechanical properties of the fabric were compared and analyzed.Finally,based on the feasibility test of the finite element method,the fabric cell model was built using TexGen professional textile modeling software,and the effects of yarn raw material,structure,fineness and twist on the tensile mechanical properties of the fabric were analyzed;according to the actual size of the tensile specimen of the fabric,the fabric proportional model was established in a 1:1 ratio in front of the finite element software ABAQUS/CAE,and the effects of fabric structure and warp and weft density on the tensile mechanical properties of the fabric were analyzed.Results show that:(1)Both the fabric unit cell model and the fabric proportional model can simulate the tensile mechanical properties of fabrics by using ABAQUS finite element software,and the advantages of the two models in simulating fabric stretching were compared,it was found: The TexGen fabric unit cell model was meticulous and realistic,when the fabric tensile simulation was carried out,the stress distribution after tensile deformation of the fabric can be accurately reflected from the mesoscopic angle,and the tensile mechanical properties of the fabric can be quickly estimated.The ABAQUS/CAE fabric proportional model was established according to the sample size of 1:1,when the fabric tensile simulation was carried out,the tensile deformation of the fabric can be comprehensively analyzed from the macroscopic point of view,and the tensile mechanical properties of the fabric can be accurately evaluated.(2)After analyzing the effects of yarn raw materials,structure,fineness and twist on the tensile mechanical properties of the fabric,it was found: The tensile strength of the yarn itself was influenced by the yarns of different raw materials,structures,fineness and twisting due to the difference in fiber properties,quantity,cohesion,and tightness,which affected the tensile mechanical properties of the fabric.(3)After analyzing the fabric structure,the warp and weft density of the fabric on the tensile mechanical properties of the fabric,it was found that: When the fabrics of the same yarn,the same density,and different tissues were stretched,the more the fabric interlacing points and the shorter the floating length line,the stronger the fabric was resistant to external force deformation;the more the yarn was flexed,the greater the elongation of the fabric resulting from the bending to the straightening of the yarn in the fabric.When the fabrics of the same yarn,the same structure and different densities were stretched in the warp direction,increasing the warp direction density of the fabric can increase the tensile mechanical properties of the fabric more than increasing the weft density of the fabric.
Keywords/Search Tags:fabric tensile, physical model, finite element method, numerical simulation
PDF Full Text Request
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