Investigation of fiber slippage in the chopping process of carbon fiber tows under rigid support
Investigation of fiber slippage in the chopping process of carbon fiber tows under rigid support
复制标题
刚性支撑下碳纤维丝束短切过程中纤维滑移研究
DOI：
10.1177/0040517521996082
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发表时间：
2021-03
影响因子：
2.3
通讯作者：
Yingxi Xie
中科院分区：
文献类型：
--
作者：
Longsheng Lu;Fei Gao;Yang Chen;Yingxi Xie
作为碳纤维的一种重要应用形式，短碳纤维及其生产工艺具有不言而喻的研究价值。本文对刚性支承下碳纤维丝束的切割过程及切削力大的根本原因进行了探讨。将含有1-3000根单丝的大丝束CFF切碎，观察并描述了断裂过程。结果表明，在切碎过程中，纤维发生了明显的滑移现象和中间断裂行为。这些因素不仅增加了切削力，而且导致切削力沿宽度的分布不均匀。建立了纤维滑移和中间断裂的力学模型。以材料力学和分析力学为基础，用哈密顿原理描述了纤维滑移和中间断裂的真实过程。此外，还设计了宽度约束实验来间接验证纤维滑移现象和中间断裂行为。通过对应力曲线的分析，证明合理的宽度约束可以有效地限制纤维的滑移，改善切削力沿刀具宽度的均匀分布，从而减小切削力。这项工作对碳纤维生产中的切碎工艺具有很好的指导意义。
As an important application form of carbon fiber (CF), short CFs and their production process have self-evident research value. In this work, the chopping process of CF tows under rigid support and the essential cause of high cutting forces were explored. Large-tow CFs containing 1–3000 single filaments were chopped, and the fracture processes were observed and described. It was found that obvious fiber slippage phenomena and intermediate fracture behaviors occurred during the chopping process. These factors not only increased the cutting force but also caused an uneven distribution of the cutting force along the width. A mechanical model was established to explain the fiber slippage and intermediate fracture. Based on material mechanics and analytical mechanics, the real process of fiber slippage and intermediate fracture was described by Hamilton’s principle. Moreover, a width constraint experiment was designed to indirectly verify fiber slippage phenomena and intermediate fracture behaviors. Through the analysis of the stress curve, it was proven that a reasonable width constraint could effectively limit fiber slippage and improve the uniformity of the distribution of the cutting force along the width of the tool, thus reducing the cutting force. This work can be used as an excellent guide for the chopping process in CF production.
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DOI：
10.1007/978-981-10-8135-4_4
发表时间：
2018-06
期刊：
Springer Tracts in Civil Engineering
影响因子：
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通讯作者：
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DOI：
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期刊：
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影响因子：
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影响因子：
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DOI：
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发表时间：
2016-10
影响因子：
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作者：
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影响因子：
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