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| 題名: | 強化複合材料鑽削過程中脫層分析建模之研究
Study of Modeling Delamination Analysis in Drilling Reinforced Composite Materials |
| 作者: | 郭展源 |
| 貢獻者: | 精密機械與製造科技研究所 |
| 關鍵詞: | 強化複合材料
反應曲面法
中央合成設計
脫層
有限元素分析 |
| 日期: | 2011-07
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| 上傳時間: | 2013-11-19T06:51:03Z
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| 摘要: | 在強化複合材料鑽削加工因受低速撞擊旋轉力量而造成材料表面之脫層破壞現象，此脫層為複材使用壽命縮短的主因。為了瞭解複材的脫層破壞行為，進而減少脫層破壞，本論文針對複材薄板做鑽削加工模擬，並使用複材脫層破壞準則及有限元素分析建立複材薄板脫層分析數值模型，以分析脫層應力分佈及預測脫層破壞的趨勢。為了驗證複材鑽削脫層模型的正確性，本文使用反應曲面法之中央合成設計實驗計畫法(CCD)規劃實驗，並以進給率、主軸轉速及刀具直徑為實驗參數，並將實驗測試結果與預測結果予以比對探討。其結果顯示，當進給率提升而增加切削量，主軸轉速提高脫層係數有下降之趨勢；加工條件於固定主軸轉速時，刀具直徑越大所產生切削力越大即脫層會隨之增加。脫層對複材薄板實驗值與預測值，經由變異數分析ANOVA R2值顯示，刀具的影響效果對於薄板脫層最為顯著，經有限元素建模分析模擬後應力分佈最大為1.56MPa。由本論文研究除可建立複合材料鑽削加工之脫層預測分析和了解各項參數間的影響關係，並可藉由分析結果改善提升複合材料鑽削加工之品質。
The delamination of cutting surface is made by low-speed impact in drilling process for reinforced composite material. The delamination phenomenon will reduce the life-spam of composite materials. To study the behavior of delamination and thereby reduce delamination failure, the numerical model of delamination for composite plate in drilling process simulation, was established by using delamination failure criteria and finite elements analysis methods to the stresses distribution and trend of predict delamination failure. To verify the accuracy of numerical model of delamination in drilling process, the central composite design(CCD) program experiments based response surface methodology is applied in this thesis. The feed rate, spindle speed and tool diameter was set as experimental parameters the experimental plan, Then the experimental test results to be compared with the predicted results and discussion. The results show that when the feed rate to enhance and increase the volume switch cut, spindle speed increase delamination factor with the trend down; processing conditions on the fixed spindle speed, tool diameter, the greater the force generated by switching the greater the cut will increase the delamination composite sheet of thin experimental and predicted values, by analysis of variance ANOVA R2 values show that the impact of cutting tools for sheet delamination of the most significant effect, simulated by the finite element modeling and analysis of stress distribution after a maximum of 1.56MPa. In addition to this thesis by the establishment of drilling of composite materials, delamination prediction analysis and understanding of the impact of the relationship between the parameters, the results can be used to improve and enhance the quality of drilling composite materials. |
| 描述: | 指導教授:江俊顯 |
| 顯示於類別: | [機械工程系(含精密機械與製造科技碩士班)] 學位論文
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