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微-细双尺度单胞下织物预成型体渗透率预测

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Keywords: 双尺度单胞,Brinkman方程,渗透率,几何建模,有限差分法

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Abstract:

建立了描述双尺度单胞内树脂流动的数学模型,基于最小势能原理建立了织物单胞逼近真实的几何模型。研究了由纱线卷曲和相互挤压引起的微观渗透率分布的不均匀性及其在流动求解上的处理方法;基于有限差分法建立了树脂流动控制方程数值求解方法,并开发了相应软件包,求得了单胞内树脂流动压力和速度场,进而获得了渗透率预测值;通过与文献预测数据和实验值对比,证明了本文中预测模型和求解方法的正确性。

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