There are two types of flow mechanism in prepreg processing: shear flow, in which resin and fibers flow together, and percolation flow, in which resin flows out of the gaps between fibers. In this study, we experimentally evaluated how these flow mechanisms change during cure including the gelation stage. Results of compression tests at various initial degree of cure at the start of compression showed that the maximum amount of shear flow is almost constant before matrix gelation. In the gelation region of matrix resin, shear flow still occurs at the gel point whilst percolation flow has completely stopped. Furthermore, it was suggested that the limit of the shear flow in the gelation stage can be described by the combined effects of the shear modulus of the fiber-bed and the shear storage modulus of matrix resin.

在预浸料加工中有两种流动机制：剪切流，其中树脂和纤维一起流动，以及渗流，其中树脂从纤维之间的间隙流出。在这项研究中，我们通过实验评估了这些流动机制在固化过程中如何变化，包括凝胶阶段。压缩开始时不同初始固化程度的压缩测试结果表明，在基质胶凝之前，最大剪切流量几乎是恒定的。在基体树脂的胶凝区，在胶凝点处仍发生剪切流，而渗流已完全停止。此外，有人提出凝胶阶段剪切流的极限可以通过纤维床的剪切模量和基体树脂的剪切储能模量的综合影响来描述。