Air-texturisation is a process that adds bulkiness to bundles of fibres. In this study, the permeability and compaction behaviour of air-texturised glass fibre rovings are experimentally characterised and compared to conventional unidirectional rovings. Based on radial impregnation experiments and single-step compaction/decompaction tests, the following main findings are highlighted: Compared to conventional unidirectional-rovings, the normalised permeability of the air-texturised rovings was approximately three times higher along the fibre direction and 40 times higher transverse to the fibre direction. Accordingly, the degree of anisotropy was approximately one magnitude lower. At a compaction pressure of 1 and 5 bar, the air-texturised rovings were compacted to a volume fraction of V f = 0 . 34 and 0.43, respectively, which was approximately 30% lower than the volume fraction achieved for the conventional unidirectional-rovings. Finally, it was observed that the decompaction of air-texturised rovings exhibits a more distinct elastic response when unloaded.

中文翻译：

---

空气变形玻璃纤维粗纱的渗透性和压实行为：表征研究

空气变形是一种增加纤维束蓬松度的过程。在这项研究中，空气变形玻璃纤维粗纱的渗透性和压实行为通过实验表征，并与传统的单向粗纱进行了比较。基于径向浸渍实验和单步压实/分解测试，突出了以下主要发现： 与传统的单向粗纱相比，空气变形粗纱的归一化渗透率沿纤维方向高出约 3 倍，高出 40 倍横向于纤维方向。因此，各向异性程度大约低一个数量级。在 1 巴和 5 巴的压实压力下，空气变形粗纱被压实到体积分数 V f = 0。分别为 34 和 0.43，这比传统单向粗纱的体积分数低约 30%。最后，观察到空气变形粗纱的解压在卸载时表现出更明显的弹性响应。