Investigation on the novel measurement for fabric wrinkle simulating actual wear

It is very important to measure fabric wrinkling objectively and accurately. However, the most commonly used measurements could not be employed to realistically evaluate and predict how fabric will resist wrinkle when worn on human body. In our previous study, an equipment of measuring fabric wrinkling that can simulate actual wear was proposed. In this paper, we conduct further investigation on the measurement for fabric wrinkle-simulating actual wear, including improving the equipment, validating its repeatability, and clarifying its more accurate relationship with the wrinkle recovery angle (WRA) method. Results show that the measuring repeatability of the method is much better than WRA method and fabric wrinkling in the warp and bias direction plays more important part than weft. Therefore, it is advisable that WRA of the bias should be increased, whose measurement stability is the best in the WRA method as well. Equations of Wrinkle Density (WD) with WRAs are established, which can be used to estimate wrinkling of clothes after actual wear only by several WRAs of fabrics, avoiding the tedious clothes making and trial work.     

织物折皱回复的各向异性表征

针对织物折皱回复存在各向异性且难以描述的问题,将通过研究试样取向角与其对应的折皱回复角的关系,寻找更科学的织物折皱回复性能表征方法。选择纯棉平纹和斜纹织物为实验材料,从经纱方向（取向角定为0°）顺时针旋转,每隔15°取一试样,平纹织物取样角度范围为0°~90°,斜纹织物取样角度范围为0°~180°。通过机器视觉测量每一试样的折皱回复角,结果表明：平纹织物可用15°和75°取向角对应的折皱回复角均值表征织物折皱回复性能;斜纹织物折皱回复角与其纹路角度密切相关,对于左斜120°左右的斜纹织物,正面用取向角15°、105°、120°的折皱回复角均值,反面用取向角0°、60°、120°的折皱回复角均值来表示织物折皱回复性能更加合理。     

声波对V形预混火焰锋面皱褶的影响

对声波扰动下V形预混火焰的锋面皱褶进行了动态分析,建立了声波扰动V形预混火焰的实验台,通过精细热电偶探测火焰锋面皱褶的变化,测量了不同声波扰动频率下的V形预混火焰的锋面皱褶.实验结果与分析结果一致,表明V形预混火焰锋面皱褶的频率与声波扰动频率相同,火焰锋面皱褶的幅值随着声波扰动频率的增大而减小.     

Analysis of effect of pressure on surface accuracy for inflatable antenna

Pressure is one of the important measures to control the surface accuracy of the reflector of inflatable antenna. Experiments and numerical analysis were carried out to highlight the effect of pressure on accuracy. The rapid, contactless and low-cost digital photogrammetry system （DIES） was employed to investigate the effect according to its lightweight and flexible characteristics. Measurement data show that the best pressure and the best area in this pressure can be obtained. Numerical analysis was conducted to check the measurement result. It is indicated that there is a little difference between them attributed to wrinkle. Results of analysis and experiments show that surface accuracy of the reflector can be adjusted by controlling pressure.     

基于关键帧的三维人脸皱纹动画

表现人脸的皱纹特征是提高人脸动画真实感的重要因素之一,文章提出了一种基于关键帧的皱纹动画方法,使用高度图、法线图和MPEG-4人脸运动参数描述皱纹动画关键帧,通过对高度图、法线图插值生成皱纹动画中间帧。所提方法对人脸模型网格复杂度要求不高,且合成的皱纹动画具有真实感强和实时性高的特点。     

拉伸件的主要质量问题分析及控制方法

简述了金属件拉伸成形原理和特点,通过对典型拉伸件产生的各类质量问题的分析。总结了在设计拉伸模时,应重点注意的问题,并提出了控制拉伸件质量的方法。     

PMMA在石墨烯转移过程中对其表面准周期褶皱的影响

利用CVD方法在铜基底上制备了大面积石墨烯,将其转移到PMMA表面,利用AFM和STM对转移前后的石墨烯表面进行了研究,结果表明,利用CVD方法制备的石墨烯表面存在由Cu基底表面台阶引起的大面积准周期性条纹状褶皱;当石墨烯转移到PMMA表面后,褶皱数量显著减少,表面杂质颗粒和裂痕减少,表明PMMA与石墨烯间的相互作用能够提高石墨烯的平整度,改善石墨烯的质量。     

基于屈诱多形态力学测试的织物外观平整度表征

针对现有基于图像或视觉原理的织物外观平整度的测试方法易受到织物复杂花型和纹理的影响,存在织物品类适应性差等不足,提出基于后屈曲诱导的织物多形态构建和力学性能原位检测原理的织物外观平整度表征手段.选取30块织物试样进行多重形变下的原位力学测试,分别提取力-位移测试曲线的5个特征指标,利用SPSS软件对提取的织物特征指标及...     

棉织物羟丙基-β-环糊精接枝整理工艺研究

以无甲醛树脂Arkofix NZF为交联剂,MgCl2·6H2O为催化剂,采用轧-烘-焙工艺,用羟丙基-β-环糊精(HP-β-CD)整理棉织物。研究了HP-β-CD的质量浓度、树脂质量浓度、MgCl2·6H2O质量浓度、pH值、焙烘温度和时间等因素对织物性能的影响,确定最佳接枝工艺为:HP-β-CD质量浓度50g/L,树脂质量浓度60g/L,MgCl2·6H2O质量浓度10g/L,pH值5.5,焙烘温度170℃,焙烘时间3min。结果表明,经HP-β-CD整理的织物折皱回复角和接枝率比经β-CD整理后的高。     

几种不同组织结构的衬衫面料保形性研究

根据常见的衬衫面料组织结构,使用JC9.7 tex纱线设计了6种不同组织结构的面料,研究不同组织结构对织物保形性的影响。对面料的保形性(尺寸稳定性、抗折皱性、外观平整度、抗起毛起球性、顶破性、悬垂性)及舒适性(透气、透湿性)进行了测试。结果表明:组织结构对织物的折皱回复角、外观平整度等级、顶破强力、透湿量与透气率有直接影响;织物紧度太大、太小都不利于织物的折皱回复,相同紧度下斜纹组织的抗皱性比平纹好;6种组织结构中2/2斜纹组织抗折皱性最好,2/2方平组织的顶破强力、抗起毛起球等级最高,2/2破斜纹透气、透湿性最好,2/2斜纹组织具有良好的保形性。