風力發電機近年在台灣日益蓬勃發展，葉片的設計與機械強度直接影響到風力發電的效能。本研究針對風機葉片使用的碳纖/環氧樹脂複合材料進行機械性質的探討，分為加工參數影響及環境因子-濕度影響兩部分探討。複合材料製造過程中不同的加工參數會造成機械性質的不同，本研究針對不同層數與碳纖布的方位所製造出來的複合材料做機械性質測試，再從機械強度來了解製造參數的影響。另一方面，由於風機常置於高濕度的環境，故本研究會探討環境因子-濕度對複合材料的影響，將複合材料至於高濕度環境後做機械性質測試，了解環境因子對於複合材料強度減弱程度。
　　本研究完成了不同製造參數與放置濕度環境的碳纖/環氧樹脂機械性質測試，在碳纖布不同放置角度的實驗裡，90度方向皆有較好的機械性質，也說明即使是十字碳纖布也會有些微差異，約5.5%；在不同碳纖布層數的實驗裡，不同層數會造成滲透率改變，層數過少含浸程度不好，會使得單層厚度較薄，當層數達到五層後，含浸程度明顯改善，也使單層厚度變厚，機械強度在層數越多時，可承受最大應力都有較高的強度，楊氏模數也會因為層數增多而變大，表示材料本身較不易形變。在溼度測試裡，碳纖環氧樹脂複合材料在吸收濕氣後，機械強度會有些微的上升，上升約8%，這可能與樹脂吸收濕氣後些微膨脹造成原先缺陷與空孔被填補；在持續吸收濕氣後，機械強度會明顯下降，這可能是樹脂吸濕後塑化，造成層與層之間結合力減弱，最大應力下降約27%；楊氏模數在吸收濕氣後，會持續下降約21%，濕氣會使得材料本身受力後較容易產生形變。

In rent years, the development of wind turbine is rapid in Taiwan. The design of blade directly impact power effectiveness. In this study, the effect of manufacturing parameters and environmental factors on mechanical properties of carbon fiber/epoxy composites was discussed. The different manufacturing parameters in manufacturing process affect the mechanical properties. Carbon composites made by different layer number and Placement angle do mechanical properties test, and the effect of the manufacturing parameters was understood by the variation of mechanical strength. Carbon composites placed in high humidity environment do mechanical properties test, and the effect of the high humidity was understood by the reduction of mechanical strength.
In different placement angle test, 90° is better than 0° in mechanical properties, so carbon fiber woven still has difference in 0° and 90°. In different layer number test, different layer number makes Permeability changes. layer number less than 5 layers makes bad impregnation and thin monolayer thickness. Composites made by 10 layers carbon fiber woven have better maximum stress, Young’s modulus. In high humidity test, the composite absorbs a little moisture and the mechanical strength slightly rises. The reason of increased mechanical strength is that epoxy expands and voids and defects are filled. When composite absorbs more moisture, the mechanical strength significantly decrease. The possible reason is that the epoxy plasticize and binding force between layers decreases. Maximum stress decreased by about 27%

摘要 i
第一章 前言 1
第二章 文獻回顧 3
2-1 複合材料介紹 3
2-1-1 碳纖維介紹 3
2-1-2環氧樹脂介紹 4
2-2 風力發電機葉片介紹 7
2-3 複合材料製作 8
2-3-1手工積層法(Hand Lay Up) 9
2-3-2壓擠轉注成型法(Compression Transfer Molding, CTM) 9
2-3-3真空輔助樹脂轉注成型(Vacuum Assisted Resin Transfer Molding, VARTM) 10
2-4 複合材料的溼度影響 13
2-5 複合材料破壞機制 16
第三章 實驗方法 18
3-1 實驗材料 18
3-2 使用儀器及設備 19
3-3 試片製作 23
3-4 實驗設計 27
3-4-1 加工參數不同 27
3-4-2 環境因子-濕度的影響 29
3-5 機械性質測試 32
3-5-1 拉伸測試 33
3-5-2 彎曲測試 34
3-6 滲透率量測 35
第四章 實驗結果與討論 37
4-1 不同放置角度測試結果 37
4-2 不同層數測試結果 40
4-2-1 拉伸測試 40
4-2-2 彎曲測試 42
4-3 濕度測試結果 49
4-3-1 拉伸測試 50
第五章 結論與未來工作 65
5-1 結論 65
5-2 未來工作 66
參考文獻 67

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