共查询到18条相似文献,搜索用时 78 毫秒
1.
2.
纱线和织物的弯曲刚度 总被引:5,自引:2,他引:3
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。 相似文献
3.
4.
5.
纱线的弯曲性能是织物刚度手感的主要决定因素.借鉴香港理工大学测试纱线弯曲刚度的方法,采用KES-FB-AUTO-A测试系统对超细羊毛纯毛纱线的弯曲刚度和弯曲滞后距进行了测试分析,并建立了其回归方程. 相似文献
6.
为降低高刚度、高模量、低延伸性金属丝纱线的弯曲刚度以便于针织物的编织,分别采用传统的转杯纺纱机和管绞机对不同线密度的镀金钼丝单丝进行加捻,借助三维视频显微镜和纯弯曲试验仪分析了2种加捻工艺及单丝线密度对加捻前后纱线外观形貌以及弯曲刚度的影响。结果表明:与转杯纺得到的金属丝纱线相比,采用管绞机加捻得到的纱线外观紧密均匀且平直光洁,存在较少的残余扭矩,管绞机更适合用于对刚性纱线进行加捻;在纱线线密度相同的条件下,单丝线密度与纱线的弯曲刚度成正比,可通过降低纱线中单丝的线密度来降低纱线的弯曲刚度,从而增加纱线的柔软性使其更易于编织。 相似文献
7.
常用高性能纱线弯曲刚度的测量和表征 总被引:1,自引:0,他引:1
由于轴向织物增强薄壳体复合材料越来越成为研究的热点课题。衬纱是轴向织物的重要组成部分,弯曲变形是织物变形的主要形式,因此,衬纱的弯曲刚度对织物的三维成型性能有着重要影响。本文借助KES织物风格仪,通过测量最大弯矩值M_max和拟合斜率值s,表征四种常用高性能纱线的弯曲刚度。实验结果表明:在相同线密度下,高性能纱线的弯曲刚度大于传统纱线的弯曲刚度,四种高性能纱线的弯曲刚度由大到小依次是碳纱线、玻璃纱线、高强聚乙烯纱线、芳纶纱线;高性能纱线的弯曲刚度受纱线中单丝的排列、聚集状态影响,并且随着进入角度的增加而减小。 相似文献
8.
9.
改进仪器测试纱线弯曲性能 总被引:5,自引:1,他引:4
对电子式单纤维强力仪进行改进,测试纱线相对弯曲强度的具体过程及步骤,该方法测量了不同混纺比毛涤混纺纱的弯曲强度,分析了影响不同混纺比纱线弯曲强度的主要因素,实验证明,采用改进的电子式单纤维强力仪可以方便,精确,定量测试纱线的相对弯曲强度。 相似文献
10.
对由普通与超细聚酯纤维纺成的村田喷气纺纱线的结构进行了研究和比较。用带有数码相机的光学显微镜进行纱线的结构研究。由拍摄的照片可得到很多纱线结构参数,如纱线正常区域的直径、包覆区域的直径、纱线中心处纤维的螺旋角、纱线表面纤维的螺旋角、被包覆纤维包覆的包覆区域的长度、包覆纤维包覆的区域、包覆区域纱线的弯曲刚度等。结果表明:由超细纤维纺纱制成的纱线的弯曲刚度比普通纤维的弯曲刚度低;纤维类型影响包覆摩擦因素以及纤维包覆区域;由超细纤维纺成的纱线的直径比普通纤维的小。 相似文献
11.
12.
13.
《纺织学会志》2013,104(6):389-399
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. 相似文献
14.
15.
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。 相似文献
16.
Abstract Banding and shear properties influence the drape and handle characteristics of woven fabrics. As bending and shear rigidities of woven fabrics generally have high degree of association, it is difficult to design a woven fabric having low bending rigidity and high shear rigidity or vice versa. This paper deals with the optimization of bending and shear rigidities of woven fabrics using the desirability function approach. Low stress mechanical properties such as bending rigidity and shear rigidity have been combined to represent ‘the overall desirability’ which is varying from 0 to 1. The overall desirability has been maximized against the target values of shear and bending rigidities. It was possible to attain overall desirability of 0.684 resulting from individual desirability of 0.662 and 0.707 for banding and shear rigidities, respectively. Experimental validation confirms that the applied method can be effectively used to optimize the woven fabric mechanical properties at low stress region. 相似文献
17.
18.
针对现有织物弯曲性测试需要用多块试样才能得到多个测试结果的现状,提出一种既简便又节约面料的预测毛织物弯曲性的方法蝴蝶结法。详细阐述了用蝴蝶结法测试织物弯曲性的实施步骤及采用的表征参数:蝴蝶结面积、宽度、高度和角度。以18块毛织物为研究对象,用新方法与传统方法进行对比测试分析。结果表明:新方法中的4个参数与毛织物的抗弯刚度都具有较好的相关性,且越硬挺的毛织物形成的蝴蝶结角度、宽度和面积越大,高度越小,其中蝴蝶结面积与抗弯刚度的相关性最高;用蝴蝶结法建立的蝴蝶结面积与织物抗弯刚度的关系式可预测毛织物的抗弯刚度。 相似文献