在微重力环境下表面张力对含短纤维注模过程影响之研究-德霖.PDFVIP

力 力 年六 力力 李 理 流 力 力流 流 狀 了 (visulaliztion) CCD 流 力 力料 流 力 流狀 力 兩力 流狀 來 行(resin transfer molding) 力度料 料 力力 285 Study of Surface Tension Effect on Resin Transfer Molding under Micro-Gravitation Condition 1 2 Tai-Song Chen and Chien-Te Li Department of Mechanical Engineering, De Lin Institute Technology Abstract To analyze the effects of surface tension and gravitation in the flow field, the orientation of short fiber, and the development of flow front during the filling process, a experiment providing flow visualization of the mold filling process was constructed. To record the progression of the fluid flow front in the mold, the experiment is filmed using a CCD. The effects of gravitation and surface tension on the development of flow front progression and front shape are examined for a wide range of the governing parameters (namely, the capillary and Bonds numbers). It has been found that surface tension tends to hold the flow front in symmetric shape while gravitation is to distort it. The balance of these two forces has significant effects on the progression of the flow and the front shape. The present results provide useful information in the design of resin transfer molding process in space. Keywords: Composite