树脂流动对气泡运动特性的影响

为了排除复合材料成型过程中的气泡, 建立了气泡运动可视化装置, 研究了树脂流动状态和流动速度对气泡运动速度的影响, 并在此基础上建立了气泡运动模型。研究结果表明: 树脂流动对气泡运动有明显的带动或阻碍作用。当树脂流动方向与气泡运动方向相同时, 随着树脂流速的增加, 气泡的运动速度明显增大; 而流动方向相反时, 随着树脂流速的增加, 气泡的运动速度呈明显下降的趋势。所建立的气泡运动模型与实验结果基本吻合。该研究结果将为热压成型过程中气泡运动模型的建立奠定基础。 

Effects of the resin flow on the bubble moving behavior

In order to eliminate the bubbles during composites manufacturing, a bubble movement visual setup was built, and the effects of the resin flow state and flow velocity on the bubble rising velocity were investigated. On the basis of experimental analysis, a bubble movement model was proposed. The results demonstrate that the resin flow has distinct driving effects on the bubble movement. When the resin and the bubble have the same movement direction, with the increasing of the resin flow velocity, the bubble velocity will increase greatly. When the movement direction is opposite, the bubble movement velocity will show the decreasing trend with the increasing of the resin flow velocity. The model is in agreement with the experimental value. These results will provide the basis for establishing the bubble movement model in the hot-compaction process.