机织结构中液态水传输行为的数值模拟

【作者】 胡倩倩；

【导师】 刘让同； 黄林军；

【作者基本信息】 中原工学院 ， 材料与化工， 2023， 硕士

【摘要】 本文以纱线和机织物为载体,通过研究液态水在不同半径的纱线、不同间距的纱线、不同间距的机织物和不同浮长的机织物中传输行为的仿真数值模拟,观察液态水在纱线和机织物中的传输行为,分析液态水在机织物中的传输机理,寻找液态水在机织物中传输的最有利条件,探索液态水在机织物中传输行为的可控性,为吸湿快干服装面料的研究设计提供理论依据。为了探究机织结构对液态水传输行为的影响,通过建模软件建立较为真实的纱线集合体模型和机织物模型,改变纱线结构和织物结构并根据纱线和织物结构参数构建相应物理模型,求解不同参数下液态水的铺展形态与传输距离,通过分析影响液态水传输行为的因素,探究机织物产生高吸湿快干性能的原因以及液态水在不同机织结构参数下的传输规律。为了探究纱线细度对液态水传输行为的影响,利用仿真模拟软件构建半径分别为r(半径)、1/2r、1/4r、1/8r的3D纱线集合体模型。为了探究间距对液态水传输行为的影响,分别构建间距为0、0.02r、0.04r、0.06r、0.08r、0.1r的3D纱线集合体模型和间距为0、0.1r、0.2r、0.3r、0.4r、0.5r、0.6r、0.7r的3D机织物模型。为了探究浮长对液态水传输行为的影响,分别构建浮长为2、3、4、5、6、7、8、9、10、11、12、13、14、15的3D机织物模型。最后对模型进行仿真模拟,得到了液态水在不同模型中的传输过程。模拟得到了液态水在不同结构的纱线和机织物中浮长方向、垂直浮长方向及厚度方向上的扩散距离及传输形态。最后与液态水在机织物中实际测试的扩散情况进行了对比,通过实验验证了数值模拟的真实性与有效性,对研究和开发吸湿快干面料具有重要的指导意义。结果表明:纱线半径、纱线间距和织物结构会影响液态水在机织物中的传输距离和铺展形态。液态水在机织物上的传输存在“椭圆”,“十字”,“单向”三种典型形态以及单向,双向两种传输方式;纱线的吸湿能力随半径的减小而减小;增加纱线间距有利于机织物中液态水的传输,但不是一直增加,有利于液态水的传输的间距条件最好控制在0.2r左右;增加浮长有利于液态水的扩散,但并不是一直增加,随着浮长的延长扩散距离会不断缩小,有利于液态水的传输的浮长条件最好控制在4上1下左右。更多还原

【Abstract】 This article uses yarns and woven fabrics as carriers to study the simulation numerical simulation of the transmission behavior of liquid water in yarns of different radii,yarns with different spacing,woven fabrics with different spacing,and woven fabrics with different floating lengths.It observes the transmission behavior of liquid water in woven fabrics,analyzes the transmission mechanism of liquid water in woven fabrics,and seeks the most favorable conditions for the transmission of liquid water in woven fabrics,Exploring the controllability of liquid water transport behavior in woven fabrics,providing a theoretical basis for the research and design of moisture absorbing and fast drying clothing fabrics.In order to explore the influence of woven structure on the transfer behavior of liquid water,a more realistic yarn aggregation model and woven fabric model were established through modeling software.The yarn structure and fabric structure were changed,and corresponding physical models were constructed based on the structural parameters of the yarn and fabric.The spreading form and transfer distance of liquid water under different parameters were solved,and the factors affecting the transfer behavior of liquid water were analyzed,Explore the reasons for the high moisture absorption and quick drying performance of woven fabrics,as well as the transfer law of liquid water under different woven structural parameters.In order to investigate the effect of yarn fineness on liquid water transport behavior,3D yarn aggregation models with radii of r(radius),1/2r,1/4r,and 1/8r were constructed using simulation software.In order to investigate the influence of spacing on the transport behavior of liquid water,3D yarn aggregation models with spacing of 0,0.02r,0.04r,0.06r,0.08r,0.1r,and 3D woven fabric models with spacing of 0,0.1r,0.2r,0.3r,0.4r,0.5r,0.6r,and 0.7r were constructed.To investigate the effect of floating length on the transport behavior of liquid water,3D woven fabric models with floating length of 2,3,4,5,6,7,8,9,10,11,12,13,14,and 15 were constructed.Finally,the model was simulated and the transmission process of liquid water in different models was obtained.The diffusion distance and transport morphology of liquid water in the floating length direction,vertical floating length direction,and thickness direction of yarns and woven fabrics with different structures were simulated.Finally,a comparison was made with the diffusion of liquid water in actual testing of woven fabrics,and the authenticity and effectiveness of the numerical simulation were verified through experiments.This has important guiding significance for the research and development of moisture absorbing and fast drying fabrics.The results indicate that yarn radius,yarn spacing,and fabric structure can affect the transmission distance and spreading shape of liquid water in woven fabrics.The transmission of liquid water on woven fabrics has three typical forms:"ellipse","cross",and"unidirectional",as well as two transmission modes:unidirectional and bidirectional;The moisture absorption capacity of the yarn decreases with the decrease of the radius;Increasing the yarn spacing is beneficial for the transmission of liquid water in woven fabrics,but it is not always increasing.It is best to control the spacing conditions that are conducive to the transmission of liquid water at around 0.2r;Increasing the floating length is beneficial for the diffusion of liquid water,but it does not always increase.As the floating length increases,the diffusion distance will continue to decrease.It is best to control the floating length conditions that are conducive to the transmission of liquid water at around 4 or 1.更多还原