真空輔助樹脂轉注成型(VARTM)是利用樹脂在單片模具上真空所造成之壓力差來充模的過程。雖然VARTM之充模方法與樹脂轉注成型(RTM)相似，但VARTM由於纖維的壓縮壓力以及流動樹脂壓力的變化，其預形纖維之孔隙率及滲透係數，會隨著充模過程而改變，這些在樹脂轉注成型中常被忽略。樹脂在纖維中的流動，取決於預形纖維的孔隙率及滲透係數，而纖維的孔隙率又與壓縮壓力以及流動樹脂壓力有關。本研究是考慮纖維蓆之可壓縮性下，建立可變滲透係數VARTM之充模分析。並在不同的進口設計下，探討樹脂導流層之層數和滲透係數改變時，對充模效率及完整度的影響。

Vacuum Assisted Resin Transfer Molding (VARTM) is a process by which resin is drawn by a vacuum pump through fiber preforms in a vacuum bag covered open mold. Although the approach to model the flow in VARTM is similar to the Resin Transfer Molding (RTM) process, modeling in VARTM has to consider the fiber compaction and the corresponding permeability change due to the variations of fiber and resin pressures during the filling process. The resin flow depends on the permeability of the preplaced fiber preform, which in turn depends on the fluid pressure. This research constructs the model for simulation of VARTM by and shows the effects of the different inlet positions on the filling efficiency and integrity, by considering the variable permeability due to the fiber layers compressibility and the resin distribution layer.

REFERENCES
[1] "行政院經濟建設委員會全球風力發電發展現況與展望," http://www.cepd.gov.tw/m1.aspx?sNo=0011923.
[2] 游以德, "風力發電基本教材," 台灣環保文教基金會, 2002.
[3] 吳文翔, "複材風力發電機葉片設計與分析," 國立成功大學航空太空工程研究所, 2010.
[4] " Wacker Web site," http://www.wacker.com/.
[5] J. M. Bayldon and I. M. Daniel, "Flow modeling of the VARTM process including progressive saturation effects," Composites Part A: Applied Science and Manufacturing, vol. 40, pp. 1044-1052, 2009.
[6] J. S. H. a. B. Harris, "Effect of Process Variables on The Quality of RTM Mouldings," SAMPE Journal, vol. 26, pp. 39-46, 1990.
[7] W. B. Y. a. C. W. Tseng, "Study on the Pre-Heated Temperatures and Injection Pressures of the RTM Process," J. Reinf. Plast. Compo., 1994.
[8] E. C. K. 3. S. Senibi, R.L. Sadler and V.S. Avva, "Resin Trandfer Molding (RTM); Experiments with Vacuum Assisted Methods," Composites Modeling and Processing Science, vol. 3, pp. 529-536, 1993.
[9] J. A. Acheson, P. Simacek, and S. G. Advani, "The implications of fiber compaction and saturation on fully coupled VARTM simulation," Composites Part A: Applied Science and Manufacturing (Incorporating Composites and Composites Manufacturing), vol. 35, pp. 159-169, 2004.
[10] Q. Govignon, S. Bickerton, and P. A. Kelly, "Simulation of the reinforcement compaction and resin flow during the complete resin infusion process," Composites Part a-Applied Science and Manufacturing, vol. 41, pp. 45-57, Jan 2010.
[11] L. Trevino, K. Rupel, W. B. Young, M. J. Liou, and L. J. Lee, "Analysis of resin injection molding in molds with preplaced fiber mats. I: Permeability and compressibility measurements," Polymer Composites, vol. 12, pp. 20-29, 1991.
[12] 顏培文, "真空輔助樹脂轉注成形法製造複合材料機翼結構肋之技術與電腦模擬分析," 逢甲大學紡織工程研究所, 2007.
[13] W. B. Young, "Design, Manufacturing, and Testing of Resin Transfer Molding Composites," 國科會研究計劃報告, 1994.
[14] W.-B. Young, "Numerical and Experimental Studies of Liquid Injection Molding With Preplaced Fiber Mats," Dissertation Abstracts International (USA), vol. 52, 1991.
[15] 李在雄, "風力發電複材葉片之補強纖維分佈及結構設計," 國立成功大學航空太空工程研究所, 2011.
[16] K. R. Han, S. L. Jiang, C. Zhang, and B. Wang, "Flow modeling and simulation of SCRIMP for composites manufacturing," Composites Part a-Applied Science and Manufacturing, vol. 31, pp. 79-86, 2000.
[17] R. F.Gibson, "Principles of Composite Material Mechanics," CRC Press Publishing Co., 2007.
[18] K. L. Adams and L. Rebenfeld, "Permeability characteristics of multilayer fiber reinforcements. Part II: Theoretical model," Polymer Composites, vol. 12, pp. 186-190, 1991.
[19] 王成源, "RTM製程模擬視窗程式設計," 國立成功大學航空太空工程研究所, 2000.