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首页> 外文期刊>Indian Journal of Fibre & Textile Research >Estimating the deflection of weft yarn in plain woven fabric using yarn pull out test
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Estimating the deflection of weft yarn in plain woven fabric using yarn pull out test

机译：用纱线拉出试验估算平纹织物中纬纱的挠度

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摘要

A simple and practical model has been proposed to calculate the deflection of weft in a plain woven fabric using yarn pull out test. In this modeling, the weft yarn is considered as an elastic beam, which is fixed supported at ends, and deflected at the middle by the normal load applied by the warp. The case of small deflection is adopted to calculate the maximum deflection of weft yarn and to study the shape and geometry of the bent weft. The normal load is estimated from pullout test. Bending rigidity of the weft yarn is calculated from the relation between the bending rigidities of fabric and thread. Five different weft densities have been studied. The shape of actual weft has been studied by microscopic photography from the lateral section of the fabric, and compared to the theoretical deflection curve of weft based on small deflection modeling. The results show that the actual and theoretical curves are reasonably close to each other. The maximum deflection of the weft yarn increases as the weft density (picks/cm) increases. This may be due to the increase in normal load in higher densities of the weft yarns. The results also show that the deviation of theoretical curve from the actual curve increases with the decrease in weft density.
机译：提出了一种简单实用的模型，利用拉出试验计算平纹机织织物的纬纱挠度。在此模型中，纬纱被视为弹性梁，其两端固定固定，并在经纱施加的法向载荷作用下在中间偏转。采用小挠度的情况来计算纬纱的最大挠度，并研究弯曲的纬纱的形状和几何形状。根据拉拔测试估算正常负载。纬纱的抗弯刚度由织物与线的抗弯刚度之间的关系计算得出。已经研究了五种不同的纬密度。通过显微摄影从织物的横截面研究实际纬纱的形状，并将其与基于小挠度建模的纬纱的理论挠度曲线进行比较。结果表明，实际曲线与理论曲线相当接近。纬纱的最大挠度随着纬纱密度（纬纱/厘米）的增加而增加。这可能是由于较高密度的纬纱中正常负载的增加。结果还表明，理论曲线与实际曲线的偏差随着纬密度的减小而增大。

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