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熔融沉积成型和退火热处理对短碳纤维增强尼龙6纤维取向的影响

刘斌 辛博 朱文福 孙俊峰 于华宇 黄子健

刘斌, 辛博, 朱文福, 等. 熔融沉积成型和退火热处理对短碳纤维增强尼龙6纤维取向的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 刘斌, 辛博, 朱文福, 等. 熔融沉积成型和退火热处理对短碳纤维增强尼龙6纤维取向的影响[J]. 复合材料学报, 2024, 42(0): 1-10.
LIU Bin, XIN Bo, ZHOU Wenfu, et al. Influence of fused deposition modeling and annealing heat treatment on the fiber orientation of short carbon fiber reinforced nylon 6[J]. Acta Materiae Compositae Sinica.
Citation: LIU Bin, XIN Bo, ZHOU Wenfu, et al. Influence of fused deposition modeling and annealing heat treatment on the fiber orientation of short carbon fiber reinforced nylon 6[J]. Acta Materiae Compositae Sinica.

熔融沉积成型和退火热处理对短碳纤维增强尼龙6纤维取向的影响

基金项目: 辽宁省自然科学基金面上项目(2023-MS-085);横向项目(2023 JX04 H003)
详细信息
    通讯作者:

    辛博,博士,副教授,博士生导师,研究方向为飞机工装夹具的增材制造及后处理 E-mail: xinbo@me.neu.edu.cn

  • 中图分类号: TB332

Influence of fused deposition modeling and annealing heat treatment on the fiber orientation of short carbon fiber reinforced nylon 6

Funds: Natural Science Foundation of Liaoning province (No. 2023-MS-085);Commercial research funds (No. 2023 JX04 H003)
  • 摘要: 探究了熔融沉积成型和退火热处理的工艺参数对于短切碳纤维增强尼龙6微观纤维取向的影响,以及不同碳纤维长径比的该种材料熔融沉积成型后在纤维取向上的差异。通过在单层-单丝试样的顶面进行显微观察,使用Image J软件测量平面纤维取向角,得到不同工艺参数下的平面纤维取向分布直方图,并采用正态曲线拟合以便对比分析。实验结果显示,随着打印速度的提高,取向与打印方向保持一致的纤维数量呈先上升后下降的趋势,在V=40 mm/s时获得峰值,标准差σ为11.14,频率峰值为0.42;同时,拉伸模量也呈此变化趋势,通过Pearson相关系数计算,发现两者呈强相关,增材工艺参数对拉伸模量的影响与纤维取向的变化密切相关。纤维取向一致性并非随着加入碳纤维长径比的增大而提高,而是与制件中的保留长径比相关。不同退火温度下,当退火温度介于玻璃转化温度和结晶温度之间相对于靠近两者,对于纤维取向的影响更为显著,且在150℃下获得标准差为6.39、频率峰值为0.54的最优效果。

     

  • 图  1  增材制件、测试、表征流程图

    Figure  1.  illustrates the additive manufacturing, testing, and characterization workflow.

    图  2  打印速度对拉伸模量的影响规律

    Figure  2.  The influence of printing speed on tensile modulus

    图  3  不同打印速度下的显微图像和平面纤维取向分布(a)V从20到60下的显微图像;(b) V=20;(c) V=30;(d) V=40;(e) V=50;(f) V=60

    Figure  3.  The micrographs and planar fiber orientation distributions under different printing speeds (a)The micrographs for V from 20 to 60 are presented, (b) V=20, (c) V=30, (d) V=40, (e) V=50, (f) V=60

    图  4  不同打印速度的平面纤维取向分布曲线比较

    Figure  4.  The comparison of planar fiber orientation distribution curves at different printing speeds

    图  5  纤维取向频率峰值与拉伸模量变化趋势

    Figure  5.  The trend of peak frequency of fiber orientation versus tensile modulus variation

    图  6  不同碳纤维长径比下的平面纤维取向分布对比

    Figure  6.  Comparison of planar fiber orientation distributions under different carbon fiber length-diameter ratios.

    图  7  不同碳纤维长径比下增材制件的显微图像和纤维断裂的SEM图像

    Figure  7.  Microscopic images of additive parts under different carbon fiber length-diameter ratios and SEM images of fiber breakage

    图  8  退火温度对杨氏模量的影响规律

    Figure  8.  The influence of annealing temperature on Young 's modulus

    图  9  不同退火温度下的平面纤维取向分布对比

    Figure  9.  Comparison of planar fiber orientation distribution at various annealing temperatures

    表  1  FDM工艺参数

    Table  1.   FDM process parameters

    Parameters Value Parameters Value
    Infill Density 100% Layer height 0.2 mm
    Raster angle Layer width 0.8 mm
    Nozzle temperature 300℃ Infill speed 20, 30, 40, 50,
    60 mm/s
    下载: 导出CSV

    表  2  CF270-PA6的DSC实验结果

    Table  2.   DSC experimental results of CF270-PA6

    Materials Tg/℃ Tc/℃ Tm/℃
    CF270-PA6 55 190 220
    Notes:Tg represents the glass transition temperature; Tc represents the crystallization temperature; Tm represents the melting temperature.
    下载: 导出CSV

    表  3  退火实验布置

    Table  3.   The annealing experiment setup

    SetMaterialAnnealing
    temperature/℃
    Annealing
    time/h
    1,2,3,4,5CF270-PA670,90,120,150,2007
    ReCF270-PA6nono
    Notes:Re serves as the room temperature reference group without undergoing annealing treatment.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-04-18
  • 修回日期:  2024-05-17
  • 录用日期:  2024-05-31
  • 网络出版日期:  2024-06-21

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