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1D-3D单元耦合模拟穿孔夹芯复合材料中的树脂流动行为

周子维 倪爱清 冯雨薇 王继辉

周子维, 倪爱清, 冯雨薇, 等. 1D-3D单元耦合模拟穿孔夹芯复合材料中的树脂流动行为[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 周子维, 倪爱清, 冯雨薇, 等. 1D-3D单元耦合模拟穿孔夹芯复合材料中的树脂流动行为[J]. 复合材料学报, 2024, 42(0): 1-10.
ZHOU Ziwei, NI Aiqing, FENG Yuwei, et al. 1D-3D cell coupling simulation of resin flow behavior in perforated sandwich composite materials[J]. Acta Materiae Compositae Sinica.
Citation: ZHOU Ziwei, NI Aiqing, FENG Yuwei, et al. 1D-3D cell coupling simulation of resin flow behavior in perforated sandwich composite materials[J]. Acta Materiae Compositae Sinica.

1D-3D单元耦合模拟穿孔夹芯复合材料中的树脂流动行为

详细信息
    通讯作者:

    王继辉,博士,教授,博士生导师,研究方向为树脂基复合材料力学 E-mail: jhwang@whut.edu.cn

  • 中图分类号: TB332

1D-3D cell coupling simulation of resin flow behavior in perforated sandwich composite materials

  • 摘要: 真空辅助树脂灌注工艺(VARI)作为一种高性能、低成本的制造技术,已广泛应用于大型复合材料零部件的制造。穿孔夹芯复合材料具有比强度比模量高、承载能力强等特点,然而,为了准确模拟穿孔夹芯复合材料中树脂的充模过程,需要对芯材内每个孔洞的树脂流动行为进行三维数值计算,尤其是对于大厚度构件而言需要大量的开发成本和生产周期。为了降低仿真计算复杂性和时间成本,本文提出了一种全新的3D-1D有限单元耦合计算方法,利用自开发ANSYS Fluent UDF子程序模拟树脂在芯材孔洞中的流动,避免了对数量巨大的孔洞进行物理建模,成功优化了穿孔夹芯复合材料真空灌注过程的模型构建和仿真计算过程,并通过实尺度的灌注实验验证了仿真模拟的可行性。研究结果表明,数值仿真与实验测得的灌注时间基本吻合,能够较为准确地模拟穿孔夹芯结构成型过程中树脂的流动。

     

  • 图  1  芯材孔洞截面分析

    Figure  1.  Cross section analysis of core material holes

    图  2  仿真计算流程图

    Figure  2.  Flow chart description of the simulation

    图  3  单孔模型A

    Figure  3.  Single hole model A

    图  4  网格独立性测试

    Figure  4.  Grid independence testing

    图  5  芯材孔洞入口和出口端的树脂流量

    Figure  5.  Resin flow at inlet and outlet of core perforation

    图  6  单孔模型B

    Figure  6.  Single hole model B

    图  7  单孔模型A与B的数值结果

    Figure  7.  Numerical results of single hole models A and B

    图  8  穿孔夹芯复合材料3D模型

    Figure  8.  3D model of perforated sandwich composite material

    图  9  实验装置示意图

    Figure  9.  Schematic of experimental setup

    图  10  穿孔泡沫夹芯复合材料树脂流动前沿位置对比

    Figure  10.  Comparison of resin flow front position of perforated foam sandwich composite

    图  11  40 s、201 s和702 s穿孔泡沫夹芯复合材料上表面树脂流动情况对比

    Figure  11.  Comparison of resin flow on top surface of perforated foam sandwich composite between simulation and experiment at 40 s, 201 s, 702 s

    图  12  460 s、620 s和970 s穿孔泡沫夹芯复合材料下表面树脂流动情况对比

    Figure  12.  Comparison of resin flow on bottom surface of perforated foam sandwich composite between simulation and experiment at 460 s, 620 s, 970 s

    表  1  材料参数测试结果

    Table  1.   Test results of material parameters

    Material Symbol Value
    Inlet pressure/Pa $ {P}_{\mathrm{i}\mathrm{n}} $ 0
    Outlet pressure/Pa $ {P}_{\mathrm{o}\mathrm{u}\mathrm{t}} $ −101325
    Resin viscosity/Pa·s $ {\mu }_{\mathrm{r}} $ 0.25
    Resin density/(kg·m−3) $ {\rho }_{\mathrm{r}} $ 1100
    Silicone oil viscosity/MPa·s $ {\mu }_{\mathrm{s}} $ 78.4
    Silicone oil density/(kg·m−3) $ {\rho }_{\mathrm{s}} $ 963
    Fiber volume fraction/vol% $ {V}_{\mathrm{f}} $ 41.1
    Permeability/(10−11m2) $ {\mathit{K}}_{\mathit{x}} $ 3.41
    $ {\mathit{K}}_{\mathit{y}} $ 3.77
    $ {\mathit{K}}_{\mathit{z}} $ 0.2908
    Notes: Kx, Ky−In-plan permeability; $ {\mathit{K}}_{{\textit{z}}} $− Permeability in thickness direction.
    下载: 导出CSV

    表  2  不同单元尺寸网格划分方案

    Table  2.   Meshing scheme of different element sizes

    Scheme Upper and lower fiber
    panels size/mm
    Core
    size/mm
    Element/104
    a 0.1 0.1 97.2143
    b 0.25 0.1 62.4066
    c 0.5 0.25 46.4243
    d 1 0.5 23.4103
    e 1 1 7.8904
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-01-19
  • 修回日期:  2024-02-29
  • 录用日期:  2024-03-03
  • 网络出版日期:  2024-04-01

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