This paper reports a simple, quick and reasonably accurate approach for measuring the bending rigidity of yarns. The beam method has been adapted and applied using a bending frame that has a fixed support and a simple support. The yarns are left to bend under the effect of their own weight. The accuracy and the precision of that bending frame are assessed over the time using an isotropic material and then compared against the ring-loop method and the KES-FB-2 pure bending tester. The findings show that the precision of this bending frame is acceptable. However, this bending frame gives at least 1.6 times greater values of bending rigidity than the KES-FB-2 pure bending tester, though the relationship between these two methods is linear and significant. Moreover, the spun yarns appear to have high levels of variability of the bending rigidity. This study is important as it overcomes the challenges faced while using other methods to measure the bending rigidity of yarn. It also provides a comprehensive account of the variation in this property. Further, it gives an indication of the highly non-uniform structure of spun yarns and the impact of yarn defects on the bending properties of yarns.

中文翻译：

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在两个支撑结构上使用梁方法弯曲纱线的刚度

本文报告了一种简单，快速且合理准确的方法来测量纱线的抗弯刚度。使用具有固定支架和简单支架的弯曲框架对梁的方法进行了修改和应用。纱线在自身重量的作用下弯曲。使用各向同性材料随时间评估该弯曲框架的准确性和精确度，然后与环环法和KES-FB-2纯弯曲测试仪进行比较。结果表明，该弯曲框架的精度是可以接受的。但是，尽管这两种方法之间的关系是线性且重要的，但该弯曲框架的弯曲刚度值至少是KES-FB-2纯弯曲测试仪的1.6倍。此外，短纤纱似乎具有高水平的抗弯刚度变化性。这项研究很重要，因为它克服了使用其他方法测量纱线的抗弯刚度时所面临的挑战。它还提供了此属性变化的全面说明。此外，它表明了纺纱的高度不均匀以及纱线缺陷对纱线弯曲性能的影响。