Effects of the resin flow on the bubble moving behavior

　In order to eliminate the bubbles during composites manufacturing , a bubble movement visual setup wasbuilt , and the effect s of the resin flow state and flow velocity on the bubble rising velocity were investigated. On thebasis of experimental analysis , a bubble movement model was proposed. The result s demonst rate that the resin flowhas distinct driving effect s 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 movementdirection is opposite , the bubble movement velocity will show the decreasing t rend with the increasing of the resinflow velocity. The model is in agreement with the experimental value. These result s will provide the basis for establishing the bubble movement model in the hot-compaction process.