形状记忆聚合织物弯曲回复力测试装置及试验

目前国内外对于形状记忆聚合织物弯曲回复能力的测试均在准静态条件下进行,无法动态、综合地测试与评价形状记忆聚合织物的弯曲回复能力.研制了一种能动态模拟形状记忆聚合织物弯曲形变以及恢复过程,包括传感器以及控制系统的机械测试装置.根据弯曲形变恢复过程的3个阶段定义了玻璃态弯曲回复力变化率、橡胶态弯曲回复力变化率和最大弯曲回复...     

利用织物实际弯曲形态测试其弯曲性质的算法

介绍了织物弯曲理论和测试方法的研究现状,提出了一种利用织物在自重作用下的实际弯曲形态间接测试织物弯曲性质的测试方法。详细叙述了该方法的测试原理,在此基础上利用数学多项式回归和微积分方法对实际弯曲形态曲线上的信息进行计算处理,提出了织物在自重作用下的弯矩与曲率、弯曲刚度与曲率关系的算法。利用此方法对织物进行测试,取得了很好的结果,与KES方法测试得到的弯曲刚度值对比,获得了很好的相关性验证。     

机织物沿任意方向弯曲性能的研究

文章对机织物沿任意方向的弯曲性能进行了理论分析，并推导获得了机织物斜向弯曲刚度Ｂａ的简明计算公式，当织物沿任意方向弯曲时，共弯曲刚度的最大值为经向弯曲刚度，最小值为纬向弯曲刚度，八种织物的试验结果表明，该公式与实验结果具有较好的一致性。     

智能可穿戴柔性压力传感器的研究现状与发展趋势

探讨国内外可穿戴柔性压力传感器的研究进展。分析当前柔性压力传感器的缺陷和在智能纺织品中应用的局限性因素。系统阐述柔性织物基压力传感器的制备、工作原理、结构、工艺与性能,重点探讨柔性织物基压阻式、电容式、压电式压力传感器和三维织物基压力传感器的传感性能,总结柔性织物基压力传感器开发、应用研究中需要解决的问题。结果表明,柔性织物基压力传感器及其结构的创新研究在智能可穿戴领域具有推动性作用。     

织物弯曲、折皱和悬垂性能的比较研究

织物的弯曲、折皱和悬垂性能都与织物的结构参数等因素有关，通过对选用的棉、毛、丝和化纤织物进行测试分析，结果表明，织物的弯曲、折皱和悬垂性能三者之间存在着密切的关系，并随织物品种有所不同。     

基于BP神经网络的织物斜向弯曲性能的预测

 针对织物斜向弯曲刚度传统数学模型预测精度较低的实际情况，选择若干块织物沿纬向到经向每隔10°进行弯曲性能测试，应用基于梯度的降算法的BP神经网络对织物斜向弯曲刚度进行预测，并用误差平方和作为指标进行检验和比较。实验结果表明：该网络模型能够有效预测织物斜向任意角度的弯曲刚度；与传统的数学模型相比，该网络模型的精准度和泛化能力更高，可为织物斜向弯曲刚度的预测提供一种新的客观评价方法。     

纱线和织物的弯曲刚度

归纳了纱线和织物弯曲刚度已有的测量方法特征及意义，并简要地阐述了改进单纤维电子强力仪测纱线弯曲性能的方法和实验结果，。同时对影响纱线和织物弯曲刚度的因素分别进行了详细的讨论，提出了解决纱线弯曲性能与织物弯曲性能对应测量方法和建立其间理论关系的重要性。     

纺织材料弯曲性能测试新方法

本文简介了自制纺织材料弯曲性能测试装置的基本测试原理,并对部分织物和纱线进行了实测。测试结果表明,此装置能反映不同试样间的弯曲特性差异,是一种可以用来衡量织物、纱线等纺织材料弯曲特性的新型测试仪器。     

织物悬垂性能的各向差异性研究

为研究织物悬垂性能的各向差异性，对传统的伞式测量法进行改进。选取15种常见织物，采用XDP-1织物悬垂仪对织物0°、90°、45°和135°4个方向的悬垂性进行测试并获取悬垂图像；基于所得图像提出最大展宽、投影面积和悬垂系数3个新指标；最后分析织物各向悬垂性与弯曲长度和抗弯刚度的关系。结果发现：这3个新指标与弯曲长度和抗弯刚度均具有较好的相关性；织物硬挺的方向易形成波峰，柔软的方向易形成波谷，织物某方向的悬垂性越好，越易弯曲，该方向的抗弯能力越小。这表明通过一块圆形试样的悬垂投影可以预估织物某方向的弯曲性能，利用改进的伞式法可以测量织物悬垂性能的各向差异性。     

精纺毛型织物弯曲性能预测途径探讨

实验研究差别化纤维长丝织物弯曲性能的预测公式对毛型织物的适用性。研究表明绝大多数单层毛型织物的弯曲性能对纱线织物结构的依赖关系与差别化长丝织物有类似的规律 ,得到单层毛型织物弯曲性能的预测公式。并对双层织物、高密织物及弹力织物的弯曲性能作了初步探讨。     

Influence of silk,like finishing on polyester fabric drapability北大核心CSCD

Silk, like finishing of pure polyester fabric has been a common industrial treatment method. This method can make polyester fabric closer to the texture of natural silk in terms of drapability and hand feeling. To study the improvement effect of silk, like finishing on fabric drapability, five types of polyester fabrics were treated in different conditions. YG811 fabric drapability tester was used to test the drape coefficient, and the main mechanical performance index was tested by the FAST fabric style tester. It is verified that the silk, like finishing conditions of and structural parameters of fabric have a significant influence on the drapability of treated fabric. For the same fabric with different silk, like finishing, its drape coefficient shows a negative correlation with weight loss ratio and has a linear relation with shear stiffness and bending rigidity. © 2018 China Silk Association. All rights reserved.     

缫丝生产中纤度的动态管理和测定

简便、连续、直观地测试缫丝生产过程中的生丝纤度，可对在缫纤度进行管理，有利于提高生丝质量。文章简要介绍了动态纤度测定仪的设计原理，动态纤度的测试和管理，并阐述了影响测试精度的若干因素等。     

对丝织物弯曲刚性测试方法及丝织物弯曲刚性的研究

通过对丝织物弯曲刚性测试方法的多次试验与分析，确定了初始压力、试样的形状及最大位移几个技术参数，从而为有效地利用测试手段，客观评判丝织物的服用性能提供了依据。文中还对各类丝织物的弯曲刚性进行了测试与分析。     

An analysis of the bending rigidity of warp-knitted fabrics: a comparison of experimental results to a mechanical model

This study focuses on the bending rigidity of warp-knitted fabrics as a function of knit structure (underlaps length), density (wale and course spacing) and yarn bending properties. Seven standard warp-knitted fabrics are produced with three different densities (Tricot, Locknit, three and four needles Satin, Reveres Locknit, three and four needles Sharkskin). The bending rigidity of the fabrics is measured using a Kawabata evaluation system and an automatic cyclic bending tester. Results show that the bending rigidity increases for the fabrics with a higher density and underlaps length of the front and back guide bars. In addition, a new mechanical model for the bending behaviour of warp-knitted fabrics using an energy method is presented. In this model, the knitted loop structure is assumed to consist of a series of straight and skew yarns simulating legs and underlaps while considering a rigid region lying in the direction of bending. Experimental results show that there is a reasonable agreement between the calculated and measured values for both wale and course directions.     

Analysis of bending properties of worsted wool yarns and fabrics based on quasi-three-point bending

Abstract

The bending behavior of worsted wool yarns and fabrics plays a crucial role in handling and performance of end-use textiles. Hence, the fabric/yarn bending properties were studied based on a quasi-three-point bending model by means of the theoretical modeling and the corresponding measuring method. By means of the formula and the measured curves, the curve of bending rigidity and the curvature of a fabric or a yarn can be calculated so as to characterize the bending behavior more precisely than in the previous work. All the experiments on the fabric/yarn bending rigidity have been conducted for both the worsted wool fabrics and the corresponding yarns procured from the fabrics, with the same apparatus bending evaluation system of fabric and yarn, which was developed independently. The measured results of bending rigidity and curvature curve show good correlation with the bending moment and the curvature relationship of the theoretical modeling, and the comparisons of bending rigidity among KES-FB2 (Kawabata Evaluation System for Fabrics-2 pure bending tester), FAST-2 (Fabric Assurance by Simple Testing-2 bending meter), and the independently developed apparatus show that the three systems exhibist reasonably high correlations. It is confirmed that the new apparatus and the theoretical model are both viable and precious. Meanwhile, the theoretical relationship between the yarns and the fabrics has also been discussed, and the theoretical analysis of the bending behavior between the yarns and the fabrics is helpful in selecting a better theoretical model of the fabric-to-yarn bending rigidity ratio.     

绢纺面料的分类研究

利用KES织物风格仪测量了25种绢纺面料的拉伸、剪切、弯曲等力学性能,运用系统聚类分析法进行了面料分类,基于多元方差分析确定面料最佳分类数,并探讨了分类后各类绢纺面料风格、规格参数的异同性。结果表明：所选面料最佳分类数为4类,4类面料的风格、规格参数具有明显的差异。     

重磅真丝绸起拱性能的测试研究

采用自制的起拱测试装置,对重磅真丝绸的起拱高度进行了测试和分析,得出了重真丝绸的起拱高度与织物重量,织物重量与织物紧度间的回归关系式,为重碲真丝绸抗起拱性的适合重量和紧度设计提供了数据支持。     

A Study of the Mechanical Properties of Woven Silk Fabrics. Part III: A Study of the Extensibility of Continuous-filament Woven Silk Fabrics in the Small-load Region

Continuous–filament woven silk fabrics have a very low tensile modulus in the small-load region compared with woven fabrics of other fibres having a similar structure. In the silk fabrics, there may exist a small gap between the warp and weft threads at their crossover points because of the sericin-removing treatment that is applied after weaving. The tensile behaviour of a fabric with such a gap is considered to consist of two stages. In the first stage, the bent yarn alone is stretched in the initial state of tensile deformation without any mechanical interactions between the warp and weft threads. Since the bending rigidity of silk yarns is small and the gap is relatively large, the tensile modulus of silk fabrics becomes very low in the initial tensile region. After the contact of the warp and weft threads, the soft lateral-compressional property of the silk threads leads to extensibility of the silk fabric. This stage is called here the second stage, in which the tensile and the lateral-compressional deformation properties are mainly concerned with the tensile behaviour of the fabric in this region. Silk–fibroin fibre has a small fibre crimp, and this crimp also makes the silk yarn compressible. In this paper, the extensibility of silk fabrics is analysed, with a theoretical estimation of the extensibility, and an experiment to explain the reason for the high extensibility of silk fabrics is reported.     

基于图像处理的织物弯曲性能测试方法

织物的弯曲性是体现织物柔软变形能力的重要指标,但关于织物弯曲性的研究大多集中在理论分析而非测试方法。针对这种情况,本文提出一种简便的、可同时测多块织物或多个角度的织物弯曲性能的测试方法--水滴法,并给出了其具体的使用方法以及评价指标--水滴宽度、水滴长度、水滴面积及抗弯系数。最后将20块织物的4项水滴法指标与抗弯长度及抗弯刚度进行对比分析,得出：水滴法中的4项指标与斜面法中的抗弯长度与抗弯刚度相关性从大到小依次是水滴面积、抗弯系数、水滴宽度和水滴长度,且这四者与抗弯长度及抗弯刚度都具有高度线性相关关系。这说明文中作为尝试和探索提出的利用水滴法测试织物弯曲性能是可行的。     

大豆蛋白纤维织物摩擦弯曲悬垂性能研究

为了了解大豆蛋白纤维织物的穿着舒适性,测试了大豆蛋白纤维织物的摩擦、弯曲和悬垂性能,并与蚕丝、丝素蛋白－粘胶丝、棉纤维织物进行了比较,结果表明大豆蛋白纤维织物手感滑爽、柔软,其悬垂性能优于蚕丝织物和棉纤维织物,次于丝素蛋白－粘胶丝织物。