多层混杂纤维复合材料等效渗透率影响特性分析

doi:10.19936/j.cnki.2096-8000.20260728.008

摘要/Abstract

摘要： 混杂纤维复合材料综合性能显著优于单一纤维复合材料。渗透率作为表征纤维被浸渍能力的核心参数,直接影响制品的质量与力学性能。本文采用数值模拟与试验相结合的方法,开展混杂纤维复合材料等效渗透率研究。建立了考虑纤维束内孔隙率的双尺度多孔介质单胞模型,与试验结果进行对比,验证了该方法的可靠性。考察了纤维种类、铺层方式及嵌套效应对单胞等效渗透率的影响特性。结果表明:单胞内碳纤维含量增加会显著降低单胞等效渗透率;不同铺层顺序下,低渗透率层会抑制高渗透率层内流体流动,进而降低单胞等效渗透率;嵌套效应会减小织物内部孔隙率、增大流动通道曲度,导致单胞等效渗透率显著下降。

关键词: 混杂纤维, 双尺度多孔介质, 等效渗透率, 单胞模型, 嵌套效应

Abstract: The comprehensive performance of hybrid fiber composites is significantly superior to that of single fiber composites. As a core parameter characterizing the impregnation ability of fibers, permeability directly affects the quality and mechanical properties of products. In this paper, a combined method of numerical simulation and experiment is adopted to study the equivalent permeability of hybrid fiber composites. A two-scale porous medium unit cell model considering the porosity within fiber bundles is established, and the reliability of this approach is validated by experimental findings. The influencing factors of fiber type, layering method, and nesting effect on the equivalent permeability of the unit cell are investigated. The results show that an increase in carbon fiber content in the unit cell significantly reduces the equivalent permeability of the unit cell; under different layering sequences, the low permeability layer inhibits fluid flow in the high permeability layer, thereby reducing the equivalent permeability of the unit cell; the nesting effect reduces the internal porosity of the fabric and increases the curvature of the flow channel, leading to a significant decrease in the equivalent permeability of the unit cell.

Key words: hybrid fiber, two-scale porous medium, equivalent permeability, unit cell model, nesting effect

中图分类号:

TB332

李永静, 胥昇文, 晏石林, 张晓楠. 多层混杂纤维复合材料等效渗透率影响特性分析[J]. 复合材料科学与工程, 2026, 0(7): 66-73.

LI Yongjing, XU Shengwen, YAN Shilin, ZHANG Xiaonan. Analysis of influencing characteristics of equivalent permeability of multilayer hybrid fiber composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(7): 66-73.

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