双层组织织物计算机模拟的实现

在建立了双层组织织物计算机模拟模块的基础上,通过对双层组织织物模拟的实现,提出了双层织物计算机模拟的基本步骤,其中模拟的关键是模拟数组单元的制作。以表里换 层组织的模拟方法为例,探讨了在计算机模拟中,表里换层的实现方法。     

阻燃双层机织面料的设计及其性能研究

以3/1右斜纹为表组织,3/1左斜纹为里组织,设计了一种"下接上"接结双层组织。在此基础上采用芳纶或芳纶混纺纱作为表经表纬,天然纤维纱线作为里经里纬,设计并织造了两种表层阻燃、里层舒适的阻燃双层机织物试样。通过对试样进行阻燃性能测试,结果表明,两种试样的阻燃性能均达到阻燃要求。通过对试样进行导水性、透湿性和透气性能测试,结果表明,试样二的阻燃性能尽管较试样一稍差,但完全符合服用面料阻燃标准要求,且试样二克重较小,舒适性能明显优于试样一.     

Representation of 3D Woven Structures by Parametric Method

A parametric method is developed to quantitatively represent the microstructure of 3D woven structures. Different binding patterns, such as angle interlock and orthogonal interlock with through-thickness or layer-to-layer bindings, are classified. A unit cell of 3D woven structure is defined with four constituent yarn systems represented by nine structural parameters. A mapping relationship between the 3D woven structure and corresponding representative parameters is thus established. The study indicates that four out of the nine parameters are necessary to represent a 3D woven structure with an angle interlock binding, and that five parameters are required to describe a 3D woven structure with an orthogonal interlock binding. Once the structural parameters are determined, the pattern of 3D woven structures can be unambiguously identified, and vice versa. In addition to the purpose of structure presentation, the method can be further used as a means for designing 3D woven structure to meet the performance requirements of 3D woven composites.     

Wet Transfer Model of Woven Fabric

To investigate wet permeability of woven fabric, a wet transfer model of woven fabric is built up and by means of the model, the main factors which have significant influences on its wet permeability function, including liquid/ material contact angle, fiber diameter, fiber cross-section configuration, the number of fibers, yarn＇s twisting angle and woven density, are discussed. Finally it is derived from the argument that optimal design of wet transfer function of woven fabric can be obtained.     

机织物组织计算机仿真模拟的数学模型与实现方法

运用计算机图形学的基本知识建立了机织物组织计算机仿真模拟的三维数学模型,并介绍了该模型的实现方法,取得了良好的模拟效果。为机织物组织计算机仿真模拟提供了一种可行的途径。     

Impact Performance of 3D Integrated Cellular Woven Composite Panel

This paper studied the impact resistance of 3D integrated cellular woven composite panel under persudo-static impact, comprised the test result with property of typical 3D woven composites, analyzed some parameters that maybe affect composites＇ impact resistance and at last used SEM to observe the damage process and mechanism of samples. The result shows that the impact resistance of 3D integrated cellular woven composites is much better than the performance of typical 3D woven composites; it is an active method to improve the impact resistance of composites that developing preform with cellular on the basis of typical 3D woven structure; for different 3D integrated cellular woven structure, the value of absorbed-energy is increasing with the hollow percentage; tiny deformatlen will not emerge on samples until the acting force gets to 85% of the maximum; similar with typical 3D woven composites, the delaminated phenomenon of 3D integrated cellular woven composites is also unapparent during impact process.     

基于自适应正交小波的机织物密度自动检测的研究

为了将计算机视觉应用于织物经纬密自动检测，提出了建立机织物自适应小波分解滤波器并研究了织物密度自动检测的方法。应用织物自适应滤波器对织物灰度图像进行小波分解，就可使分解后的子图像能很好地分别包含织物的纬向和经向纹理信息，从而可将织物子图像二值化后，根据其黑白交替变化规律，计算出织物的经纬纱密度。实验结果证明自动检测和人工测量相比，误差在3％以内。     

盘长结的小样试织研究

盘长结的外形和结构与机织物非常接近，可在小样机上试织中国结。采用管状组织与阔幅组织相配合织造盘长结结身，单个盘长结之间采用平纹来固结，在小样机经纱方向连续织造。下机后的织物进行再加工，抽出耳翼，采用手工编制几个简单的中国结激流苏再配以玉石等配件，成为一个完整的中国结挂饰。     

外科移植用可扩张编织管道的研制

介绍了医用可扩张管道的纤维材料选择与性能，管道的结构设计与编织工艺。还测试了该管道的扩张性能，并与理论分析进行了比较。     

经编双轴向织物用作涂层基布的性能优势

分别对经编双轴向织物和机织物增强材料的涂层产品进行拉伸和撕裂试验，研究了经编双轴向织物用作涂层基布时的一些性能优势：优异的拉伸性能和抗撕裂性能；较高的纱线强力利用率等等。     

织物组织计算机图像分析系统的开发

基于单纱织物的结构特点，结合几种典型的图像处理算法，探讨建立织物组织自动识别系统的方案，阐述用于组织识别的算法思路，经软件处理生成织物三种基本组织的组织图。     

Principle and Method for Structural Design of Digital Woven Fabric

IntroductionThe structural design of woven fabric is realized byinterlacement .In woven fabric ,the warp and weft threadsinterweave with each other . This rule of interlacement iscalled weave[1]. The fabric s appearance and mechanicalproperty change along with the fabric construction ofweaves . Any weave is composed by warp and weftinterlacing points alternately . The number of threadsrequired whenever the arrangement of the warp and weftinterlacing points repeats for one ti me is called a we…     

Analysis of Apparent Elasticity Constants of Woven Fabrics

The woven fabric can be defined as orthogonal elastomer if the extension force that puts on the fabric is very small. Based on the precondition, the apparent elasticity constants of a woven fabric were analyzed theoretically in the paper. The bias angle (which is between weft yarns and extension direction) affects apparent elasticity modulus and elasticity coefficient of the fabric in the extension direction. And the experiment describes fluxes of elasticity constants going with the bias angle of the fabric.     

基于摄像头采集和图像处理的机织物密度检测

采用CCD摄像头拍摄机织物图像,根据其特性进行图像处理,自动寻找条纹方向并旋转图像.通过运用误差处理的方法,得到精确的织物经纬密度.研究结果表明,拍摄一幅图像即可快速得到织物的经纬两个方向的密度,比傅里叶变换和小波变换计算量小,并可以用于实际生产过程中的纺织品密度在线检测.     

机织物悬垂屈曲的数值模拟

开发虚拟服装试衣系统需模拟织物的悬垂和屈曲，而采用正交异性力学模型不适合织物．为此，笔者基于织物的细观力学模型，用有限元方法来模拟方形织物片铺在圆桌面上的悬垂和屈曲，该细观模型描述了织物由于其细观编织结构而特有的力学性质．织物片用8结点壳单元离散，这种壳单元被特别设计，能描述织物片在悬垂中发生的大转动．对织物片的屈曲模态进行了分析，对其后屈曲变形进行了计算，也进行了方形织物片的悬垂和屈曲实验．模拟结果和实验的观测结果很一致．该研究为虚拟服装试衣系统的开发奠定了基础．     

Method of Weave Design Using the Concept of Auxiliary Dobby Shaft

The craft of auxiliary dobby shaft is one of methods used in the traditional figured woven textiles and especially brocade in China.Based on the principle of auxiliary dobby shaft,a new method of weave design was proposed.The relevant arrangement of warp and weave design were discussed.It is shown that this method can be applied on one electronic jacquard loom with single warp beam for new product development and production.And this effect will open up a new way to reproduce traditional fabrics in order to ...     

应用图像分析技术自动识别织物的组织结构

通过对机织物图像的表面形态分析,建立3种基本组织(平纹、斜纹和缎纹)的表面纹理模型,运用傅里叶变换技术得到3种基本组织的频谱模型,并建立表面纹理模型和频谱图模型之间的对应关系,从而为运用图像分析和人工智能技术自动测量织物的结构参数、识别机织物类型奠定理论基础.实验结果证明,这种方法是准确可靠的.     

等离子体处理对非织造布表面润湿性的效应

通过用等离子体处理非织造布的方法来提高其表面润湿性。电晕放电和低压辉光放电都对丙纶非织造布表面的润湿性有改善,低压辉光放电不涤纶非织造布表面的润湿性有改善。电晕放电处理非织造布的表面改性效果及改善维持时间都不如低压辉光放电。用等离子体处理非织造布来改善其表面润湿性的效果不能维持很长时间。等离子体处理可减小丙纶、涤纶非织造布表面与水的接触角,从而提高其表面的再润湿性。     

Voids'''' System in the Woven Composite Structure

IntroductionVarious types of voids , which can occure in thestructure of any kind of composite , are the result of heattreat ment (curing someti mes succeeded by pyrolysis ofmatrix precursors ) , which is the inseparable part ofcomposite manufacture .One of the most complex void systems contain thecomposites reinforced with woven fabric , e .g . so calledcri mp voids ,are typical for this type of composites only .The void system, described in this contribution, isexplaned on the structure of w…     

织物的类型及其组织元

本文对历史上出现过的现在存在的各类织物提出了新的分类法、织物可分成编织物和机织的两大类,两类之中又可根据参与织造的纱线系统来分,然后再根据其交织原理区把编织物分成环编,纠编、绞编,烧编、斜编等若干种,把机织物分为针织和梭织两类,前者包括纬编和经编;后者则包括平经和绞经。文中还提出了组织元的概念,作为一类织物的基本构成单元,它较目前所用的原组织概念更为基础。