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穿孔泡沫夹芯复合材料灌注工艺仿真与方案优选

施赫荣 王继辉 倪爱清 冯雨薇 李想

施赫荣, 王继辉, 倪爱清, 等. 穿孔泡沫夹芯复合材料灌注工艺仿真与方案优选[J]. 复合材料学报, 2023, 40(2): 782-793. doi: 10.13801/j.cnki.fhclxb.20220323.001
引用本文: 施赫荣, 王继辉, 倪爱清, 等. 穿孔泡沫夹芯复合材料灌注工艺仿真与方案优选[J]. 复合材料学报, 2023, 40(2): 782-793. doi: 10.13801/j.cnki.fhclxb.20220323.001
SHI Herong, WANG Jihui, NI Aiqing, et al. Simulation and optimization of infusion process for perforated foam sandwich composite[J]. Acta Materiae Compositae Sinica, 2023, 40(2): 782-793. doi: 10.13801/j.cnki.fhclxb.20220323.001
Citation: SHI Herong, WANG Jihui, NI Aiqing, et al. Simulation and optimization of infusion process for perforated foam sandwich composite[J]. Acta Materiae Compositae Sinica, 2023, 40(2): 782-793. doi: 10.13801/j.cnki.fhclxb.20220323.001

穿孔泡沫夹芯复合材料灌注工艺仿真与方案优选

doi: 10.13801/j.cnki.fhclxb.20220323.001
基金项目: 中央高校基本科研业务费专项资金(20211h0310)Fundamental Research Funds for the Central Universities (20211h0310)
详细信息
    通讯作者:

    倪爱清,博士,副研究员,硕士生导师,研究方向为树脂基复合材料性能及模拟仿真  E-mail: ani@whut.edu.cn

  • 中图分类号: TB332

Simulation and optimization of infusion process for perforated foam sandwich composite

  • 摘要: 以穿孔泡沫夹芯复合材料为研究对象,对其真空辅助树脂灌注(VARI)工艺进行了实验研究、仿真分析和方案优选。首先,通过实验测试与数值计算分别得到穿孔夹芯结构织物与芯材孔洞的渗透率;然后,对穿孔夹芯结构灌注过程进行三维仿真模拟,并通过实尺度灌注实验验证了仿真模拟的可靠性;最后,基于验证的仿真模型进行工艺参数优选,拟合得到了灌注时间的预测模型。结果表明:数值仿真与实验值基本吻合,能较准确地模拟穿孔夹芯结构成型时的流动过程和孔隙分布;灌注时间的预测模型可用于指导实际生产;通过优化成型工艺参数可控制树脂的流动行为,达到缩短成型时间和降低构件孔隙率的目的。

     

  • 图  1  穿孔夹芯结构中树脂流动区域

    Figure  1.  Resin flow area in perforated sandwich composite

    图  2  孔洞渗透率计算模型

    r—Radius of porosity model; A—Equvalent cross-sectional area of porosity model; l—Length of porosity model; δ—Thickness of boundary layer

    Figure  2.  Calculation model of pore permeability

    图  3  宏观/微观孔隙产生机制

    Figure  3.  Generation mechanism of macro/micro void

    图  4  穿孔泡沫夹芯复合材料仿真模型

    R—Radius of hole

    Figure  4.  Simulation model of perforated foam sandwich composite

    图  5  树脂黏度与时间关系

    Figure  5.  Relation of resin viscosity and time

    图  6  实验装置示意图

    Figure  6.  Schematic of experimental setup

    图  7  穿孔泡沫夹芯复合材料上层和下层纤维层金相图像

    Figure  7.  Metallographic diagrams of top surface and bottom surface of perforated foam sandwich composite

    图  8  穿孔泡沫夹芯复合材料孔隙率实验结果

    Figure  8.  Experimental results of porosity of perforated foam sandwich composite

    图  9  34 s、78 s和260 s穿孔泡沫夹芯复合材料上表面树脂流动情况对比

    Figure  9.  Comparison of resin flow on top surface of perforated foam sandwich composite between simulation and experiment at 34 s, 78 s, 260 s

    图  10  350 s、500 s和700 s穿孔泡沫夹芯复合材料下表面树脂流动情况对比

    Figure  10.  Comparison of resin flow on bottom surface of perforated foam sandwich composite between simulation and experiment at 350 s, 500 s, 700 s

    图  11  穿孔泡沫夹芯复合材料上、下纤维层孔隙分布

    Figure  11.  Porosity distribution of top surface and bottom surface of perforated foam sandwich composite

    图  12  穿孔泡沫夹芯复合材料VARI成型9种模型充模时间与最大孔隙率对比

    Figure  12.  Comparison of filling time and maximum porosity of 9 models of VARI for perforated foam sandwich composite

    图  13  穿孔泡沫夹芯复合材料VARI成型导流网(DM)铺放模型

    Figure  13.  Layout model of distribution medium (DM) of VARI for perforated foam sandwich composite

    图  14  不同导流网铺放位置的穿孔泡沫夹芯复合材料孔隙率分布

    Figure  14.  Porosity distribution of perforated foam sandwich composite with different laying positions of diversion network

    图  15  穿孔泡沫夹芯复合材料灌注时间预测模型

    t1, t2—Filling time; μ—Viscosity; x—Scale

    Figure  15.  Prediction of the filling time of perforated foam sandwich composite

    表  1  材料参数测试结果

    Table  1.   Test results of material parameters

    Resin viscosity/(Pa·s)Silicone oil viscosity/(Pa·s)Fiber volume fraction/vol%Permeability/(10–11 m2)
    KxKyKz
    0.210.149.23.263.260.1987
    Notes: Kx, Ky—In-plane permeability; Kz—Permeability in thickness direction.
    下载: 导出CSV

    表  2  穿孔泡沫夹芯复合材料典型位置孔隙率结果对比

    Table  2.   Porosity measurement results in typical locations of perforated foam sandwich composite

    Position123456
    Porosity/%Simulation2.311.633.561.451.660.90
    Experiment2.301.683.271.411.961.08
    下载: 导出CSV

    表  3  穿孔泡沫夹芯复合材料真空辅助树脂灌注(VARI)工艺设计方案

    Table  3.   Different vacuum assisted resin infusion (VARI) process setups for perforated foam sandwich composite

    Distribution medium (DM) locationInjection form
    Short side
    Long side
    Central section
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-01-29
  • 修回日期:  2022-02-24
  • 录用日期:  2022-03-09
  • 网络出版日期:  2022-03-24
  • 刊出日期:  2023-02-15

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