The Influence of Fiber Length Distribution on Yarn Properties Based on Fiber Random Arrangement in the Yarn

ABSTRACT

This study discussed the influence of fiber length distribution on yarn qualities (yarn irregularity and strength) based on simulation on fiber random arrangement. Yarn limit irregularity is expressed as the variation of total fiber length that could be found in each yarn subsection. Yarn strength is expressed as the total contributions that breaking and slipping fibers make to yarn strength. Fiber slippage or breakage depends on critical slipping length. Ramie yarns with different stretch-broken fiber lengths were introduced to verify the calculation. Results show that yarn limit irregularity is only dependent on average fiber length and is irrelevant with the distribution type of fiber length. Yarn limit irregularity rises slowly with the increase of average fiber length. Nevertheless, fiber length distribution has significant effect on yarn strength. When average fiber length and its variation are identical, the left deviated distribution may lead to a lower yarn strength, while the right deviated distribution may obtain a higher yarn strength. Therefore, understanding the influence of fiber length distribution on yarn properties will be helpful for selection of fiber length to produce high-quality yarns.

摘要

通过对纤维随机排列的仿真, 探讨了纤维长度分布对纱线质量 (纱线不匀率和强度) 的影响。纱线极限不匀率表示为各纱线段中纤维总长度的变化. 纱线强度表示为断裂和滑动纤维对纱线强度的总贡献。纤维的滑移或断裂取决于临界滑移长度。介绍了不同拉伸断裂纤维长度的苎麻纱, 并对计算结果进行了验证. 结果表明, 纱线极限不匀率仅与平均纤维长度有关, 与纤维长度的分布类型无关. 纱线极限不匀率随纤维平均长度的增加而缓慢上升. 然而, 纤维长度分布对纱线强度有显著影响。当平均纤维长度及其变化相同时, 左偏分布可能导致纱线强度降低, 而右偏分布可能获得较高的纱线强度. 因此, 了解纤维长度分布对纱线性能的影响, 有助于选择纤维长度, 生产出高质量的纱线.

KEYWORDS:

• Fiber length distribution
• yarn irregularity
• yarn strength
• simulation
• fiber random arrangement
• influence

关键词:

• 纤维长度分布
• 纱线不匀率
• 纱线强度
• 模拟
• 纤维随机排列
• 影响

Additional information

Funding

This work was supported by the Natural Science Foundation of Shandong Province [ZR2018BEM034].