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A CHARACTERIZATION STUDY RELATING CROSS-SECTIONAL DISTRIBUTION OF FIBER VOLUME FRACTION AND PERMEABILITY

机译:纤维体积分数横截面分布和渗透性的表征研究

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In the present study, Scanning Electron Microscopy (SEM) has been used to assess the influence of a varying cross-sectional fiber volume fraction on local permeability values. The investigated sample is a textured glass fiber reinforced polyurethane composite rod with an O5mm cross-section. The SEM investigations show a high variation in local fiber volume fraction with a mean fiber volume fraction of 0.41±0.2, which is in agreement with the value 0.41 obtained by burn-off test by the manufacturer. The additional result from the SEM investigations was a mean fiber diameter of 23.2±2.6μm, which was verified by single fiber tests. The characterization results were successfully used to evaluate the local variation in permeability over the cross-section and could most likely be a very essential input for numerical impregnation simulations.
机译:在本研究中,扫描电子显微镜(SEM)已经用于评估不同横截面纤维体积分数对局部渗透值的影响。 研究的样品是具有O5MM横截面的纹理化玻璃纤维增强聚氨酯复合杆。 SEM研究表明,局部纤维体积分数的高变化,平均纤维体积分数为0.41±0.2,这与制造商通过烧坏测试获得的值0.41一致。 SEM调查的另外的结果是平均纤维直径为23.2±2.6μm,通过单纤维测试验证。 表征结果成功地用于评估横截面上渗透性的局部变化,并且很可能是用于数值浸渍模拟的非常重要的输入。

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