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首页> 外文期刊>Journal of Reinforced Plastics and Composites >Resin pressure and resin flow inside tapered laminates during zero-bleeding and bleeding processes
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Resin pressure and resin flow inside tapered laminates during zero-bleeding and bleeding processes

机译：零渗漏和渗出过程中树脂压力和树脂在锥形层压板内部流动

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摘要

Resin pressure greatly influences resin flow, void defect, and fiber distribution inside the laminates, especially inside the composite with complex geometry. Thus, obtaining a fundamental understanding on the resin pressure inside laminates with complex shapes can provide an important guidance to control these qualities. This article is mainly focused on the resin pressure inside the composite laminates with tapered thickness and its effect on the compaction of fiber bed. The resin pressure variations inside carbon fiber fabric/epoxy resin prepreg stacks during zero-bleeding and bleeding processes were investigated by means of an on-line monitoring method. It is demonstrated that significant differences are found between the two cases. The resin pressure inside tapered stack under zero-bleeding condition evenly distributes throughout the whole cycle and leads to even distribution of fiber content. In the case of bleeding condition, the application of bleeder materials results in through-thickness and in-plane resin pressure gradients, which provide driving forces for resin flow, and it directly results in different level of fiber compaction at different regions. These results provide a basic understanding on the resin pressure characteristic inside tapered laminate during autoclave process.
机译：树脂压力极大地影响层压板内部的树脂流动，空隙缺陷和纤维分布，特别是几何形状复杂的复合材料内部。因此，获得对具有复杂形状的层压板内部的树脂压力的基本了解可以为控制这些质量提供重要指导。本文主要研究厚度逐渐减小的复合层压板内部的树脂压力及其对纤维床压实的影响。通过在线监测方法研究了碳纤维织物/环氧树脂预浸料叠层在零渗出和渗出过程中的树脂压力变化。事实证明，这两种情况之间存在显着差异。零渗漏条件下锥形叠层内部的树脂压力在整个循环中均匀分布，并导致纤维含量均匀分布。在发生渗漏的情况下，放气材料的使用会导致厚度方向上的厚度和平面内的树脂压力梯度，从而为树脂流动提供驱动力，并直接导致不同区域的纤维压实程度不同。这些结果提供了对高压灭菌过程中锥形层压板内部树脂压力特性的基本了解。

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