机械辊子上纤维束展宽模型的建立

徐然; 许文翀; 王明欢; 任峰; 信春玲; 何亚东

doi:10.13801/j.cnki.fhclxb.20230918.004

机械辊子上纤维束展宽模型的建立

doi: 10.13801/j.cnki.fhclxb.20230918.004

徐然¹,
许文翀¹,
王明欢¹,
任峰¹,
信春玲¹,
何亚东^{1, 2, ,}

1.
北京化工大学　机电工程学院，北京 100029
2.
教育部高分子材料加工装备工程研究中心，北京 100029

基金项目: 中石油“新能源与新材料创新联合体”重点项目

详细信息

通讯作者:
何亚东，博士，教授，博士生导师，研究方向为高分子材料加工原理及装备　E-mail: heyd@mail.buct.edu.cn

中图分类号: TB332
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- 文章访问数: 259
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- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2023-07-17
- 修回日期: 2023-09-05
- 录用日期: 2023-09-11
- 网络出版日期: 2023-09-19
- 刊出日期: 2024-05-15

Establishment of fiber tow spreading model on mechanical rollers

1.
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2.
Polymer Processing Equipment Engineering Research Center, Ministry of Education, Beijing 100029, China

Funds: Key Projects of CNPC's "New Energy and New Materials Innovation Consortium"

摘要

摘要: 制备预浸带需要将纤维束铺展变宽以便于树脂浸润，而牵引张力是纤维束展宽的动力来源，当前纤维束的展宽模型少有涉及牵引张力的影响效果。针对纤维束在机械棍子上的牵引展宽过程，结合受力分析得出纤维束运动系统的输入功及沿轴向、横向上的摩擦消耗功，依据能量守恒原理建立纤维束展宽模型。利用实验室自行搭建的机械棍子预分散装置，对展宽模型进行对比验证与分析。结果表明：牵引张力是纤维束展宽的重要原因，机械辊子个数、半径、光滑程度及纤维束与辊子间的包角都会影响纤维束的展宽，相较于Wilson展宽模型，能量平衡展宽模型能够更好地预测纤维的展开宽度，可用于指导纤维束的预分散过程。
- 纤维束展宽 /
- 能量平衡 /
- 机械辊子 /
- 预浸带 /
- 预分散设备
Abstract: The preparation of prepreg tape required spreading the fiber tow to facilitate resin impregnation. Traction tension is the driving force for fiber bundle spreading, but current fiber tow-spreading models rarely involve the effect of traction tension. Aiming at the spreading process of fiber tow on mechanical rollers, combining force analysis, the input work, and the friction work along the axial and lateral directions can be computed. Then the fiber tow spreading model can be established by energy conservation law. Utilizing the pre-dispersion device with mechanical rollers which was built by laboratory, contrastively validate and analyze the spreading model. The results indicate that traction tension is an important reason for fiber tow spreading. And the numbers, radius, smoothness of mechanical rollers, and the wrap angle between the fiber tow and the roller all affect the fiber tow spreading. Compared to the Wilson spreading model, the energy-balance spreading model can better predict the spreading width of fiber tow, and it can be used to guide the pre-dispersion process of fiber tow.
- fiber tow spreading /
- energy conservation /
- mechanical rollers /
- prepreg tape /
- pre-dispersion device

HTML全文

图 1 纤维束展宽过程示意图

Figure 1. Schematic diagram of fiber tow spreading process

$ {T}_{0} $—Unwinding tension of fiber tow; $ {T}_{1} $—Traction tension of fiber tow; $ f_{\mathrm{\mathit{x}}} $—Axial friction force of fiber tow; $ \overline{F}_{\mathrm{f}\mathrm{\mathit{y}}} $—Transverse friction force of fiber tow

下载: 全尺寸图片幻灯片

图 2 运动系统前后状态

Figure 2. Front and rear state diagram of motion system

$ {L}_{\mathrm{f}} $—Distance that the fiber tow pulled

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图 3 绳绕圆柱的摩擦力分析

$\phi_1 $—Total wrapping angle of the rope around the cylinder at a given time

Figure 3. Analysis of friction force of rope wrapping around a cylinder

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图 4 机械辊子上纤维束受到的轴向摩擦

Figure 4. Axial friction of fiber bundles on the rollers

$ {f}_{x\_1} $, $ {f}_{x\_2} $, $ {f}_{x\_3} $—Axial friction on each roller, respectively

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图 5 纤维束横向滑移示意图

Figure 5. Schematic diagram of fiber bundles slip laterally

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图 6 辊子顶部纤维束的受力分析

Figure 6. Stress analysis of fiber bundle at the top of dispersion roller

$ {\alpha }_{\mathrm{f}} $—Angle between the fiber tows on both sides of the roller; $ \phi $—Wrap angle of the fiber tow on the roller; $ {N}_{\mathrm{f}} $—Number of fiber monofilament; $ T_{\mathrm{\mathrm{g}}} $—Force exerted on each fiber monofilament at the vertex of the roller

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图 7 纤维束展宽前后示意图

Figure 7. Schematic diagram of fiber bundle before and after spreading

$ {w}_{0} $, $ {w}_{1} $—Widths of the fiber tow before and after spreading, respectively; $ {\Delta S}_{0} $—Distance at which the centroid of half the fiber tow is offset

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图 8 纤维束展宽过程中横向位移示意图

Figure 8. Schematic diagram of lateral displacement during fiber spreading

$ v $—Traction speed of the fiber tow; $ {L}_{0} $—Fiber tow per unit length; $ r $—Radius of the roller

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图 9 纤维束在分散辊处展宽的工艺流程

Figure 9. Process flow of fiber spreading at the dispersion roll

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图 10 牵引张力对纤维束展宽的影响

Figure 10. Effect of traction tension on fiber spreading

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图 11 碳纤维束在不同大小张力牵引时的分散效果

Figure 11. Dispersion effect of carbon fiber bundle under different tension traction

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图 12 不同模型关于单辊包角的验证试验

Figure 12. Validation experiments on wrap angle using different models

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图 13 不同模型关于辊子个数的验证试验

Figure 13. Validation experiments on number of rollers using different models

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图 14 机械辊子半径对纤维束展宽的影响

Figure 14. Effect of roller radius on fiber spreading

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图 15 摩擦系数对纤维束展宽的影响

Figure 15. Effect of friction coefficient on fiber spreading

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表 1 SE4849玻璃纤维展宽比例系数测试结果

Table 1. Test results of spreading scale coefficient of glass fiber SE4849

$ {T}_{0} $/N	$ {w}_{1} $/mm	$ {k}_{1} $
8	13.8	4.7177
9	12.6	4.6826
10	11.6	4.5526
11	10.6	4.4310
12	9.5	4.4042
13	8.7	4.1135
Note: $ {k}_{1} $—Scale coefficient of spreading width.

下载: 导出CSV

表 2 HF30 F碳纤维展宽比例系数测试结果

Table 2. Test results of spreading scale coefficient of carbon fiber HF30 F

$ {T}_{0} $/N	$ {w}_{1} $/mm	$ {k}_{2} $
8	12.3	8.5298
9	11.5	8.4465
10	10.8	8.2479
11	9.6	9.1960
12	9.0	8.9906
13	8.5	8.4642

下载: 导出CSV

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