This paper proposes a methodology for measurement of fibre misalignment in composite laminates based on the structure tensor of fibre orientations extracted from X-ray micro-computed tomography (micro-CT) images. The methodology is applied to carbon fibre/epoxy composites manufactured with two technologies: (1) by prepregging and consolidation in an autoclave and (2) by vacuum assisted resin transfer moulding. The results show that the in-plane inter-ply misalignment of fibres in the prepreg laminate and in the infusion-produced laminate is within 2–4° and 1–2°, respectively. The misalignment results allow better understanding of the manufacturing typical fibre orientation precision level for the low pressure (vacuum assisted resin transfer moulding) and high pressure (autoclave) manufacturing.

本文提出了一种基于从X射线微计算机断层扫描（micro-CT）图像中提取的纤维取向的结构张量来测量复合材料层压板中纤维错位的方法。该方法适用于采用两种技术制造的碳纤维/环氧树脂复合材料：（1）通过在高压釜中进行预浸和固结；（2）通过真空辅助的树脂转移成型。结果表明，预浸料层压板和注入生产的层压板中纤维的面内错位分别在2-4°和1-2°之内。不对齐的结果可以更好地了解低压（真空辅助树脂传递模塑）和高压（高压釜）制造的典型纤维取向精度水平。