A new light transmission method to evaluate the through thickness fibre alignment in transparent resin
A new light transmission method to evaluate the through thickness fibre alignment in transparent resin
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DOI：
10.1016/j.compositesa.2022.107000
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发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
V. Zal;M. Yasaee
中科院分区：
文献类型：
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作者：
V. Zal;M. Yasaee
本文提出了一种新的方法来分析短纤维在透明树脂层内的垂直排列，使用原位测量通过层的光透射。在该方法中，光源被放置在复合层的一侧上，并且在相对侧上，光电晶体管测量透射光强度。对准过程的一个特征导致随着光纤对准的增加而增加的光透射。使用这种技术，在磁场下的环氧树脂层内的短镍涂层碳纤维的对准进行了评估和纤维含量，场强，纤维长度和树脂厚度的对准质量的影响进行了表征。一个重要的发现是，纤维长度和树脂厚度的比率显示出对取向度的限制。最后，介绍了一个分析模型，其目的是预测平均纤维角度的样品配置的基础上，展示良好的协议与实验结果。
This work presents a new method to analyse vertical alignment of short fibres inside transparent resin layers using in situ measuring of light transmission through the layer. In this method, a light source is placed on one side of the composite layer and on the opposite side, a phototransistor measures the transmitted light intensity. A feature of the alignment process causes increased light transmission with increased fibre alignment. Using this technique, alignment of short nickel coated carbon fibres inside epoxy resin layers under magnetic field were evaluated and the effect of fibre content, field strength, fibre length and resin thickness on the alignment quality were characterised. An important finding is that the ratio of fibre length and resin thickness showcases a limit to the alignment degree. Finally, an analytical model is introduced which aims to predict average fibre angles based on the sample configuration, showcasing good agreement with experimental results.