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研究生:蔡尚南
研究生(外文):Tsai, Shang-Nan
論文名稱:含脫膠區奈米複材三明治結構之振動行為研究
論文名稱(外文):Vibration Behavior of Sandwich Structure with Face/Core Debonding and MWNTs/Polymer Nanocomposites Core
指導教授:葉孟考葉孟考引用關係
學位類別:碩士
校院名稱:國立清華大學
系所名稱:動力機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:72
中文關鍵詞:奈米複合材料奈米碳管三明治結構振動測試有限單元分析
外文關鍵詞:NanocompositesCarbon NanotubeSandwich StructureVibration TestFinite Element Method
相關次數:
  • 被引用被引用:1
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  • 下載下載:19
  • 收藏至我的研究室書目清單書目收藏:0
三明治結構是一種常用的複合材料,由於其具有高比勁度、高比強度以及質量輕等優點,近年來已被大量地使用,特別是在航空、汽車、造船、國防工業方面。三明治結構的芯材多半是選擇質量輕的材料(發泡性高分子材料或者是蜂巢狀結構);而面材通常是高強度以及高勁度的材料,例如纖維複合材料(碳纖維、玻璃纖維)或是金屬材料。本文所使用的三明治結構其芯材由環氧樹脂添加奈米碳管組成,而面材則為碳纖維疊層板的複合材料,並利用環氧樹脂做為面材和芯材的黏著劑。
本文以有限單元分析軟體ANSYS及實驗探討具有脫膠區之三明治結構之振動行為,並觀察芯材奈米碳管含量、面材碳纖維疊層板堆疊角度、以及脫膠區等三項因素對振動頻率及其模態的影響。
結果顯示芯材中添加奈米碳管會提高三明治結構的自然頻率,而不同面材堆疊方式也對自然頻率及模態有所影響;此外脫膠區越長時,自然頻率下降越多。

Because of its’ high specific strength and high specific stiffness, sandwich structure has been widely used in many applications, especially in automotive industry, aviation, shipbuilding and national defense industries. Usually, the core material of sandwich structure is light foam material or honeycomb structure, and high strength material, like fiber composites or metal material, is chosen for the facesheet. In this paper, we use MWNTs/epoxy for the core and carbon fiber laminate for the facesheet. The facesheet and core were glued together by epoxy.
The finite element analysis software ANSYS and experiment were used to study the vibration behavior of sandwich structure with or without debonding region. The influence of MWNTs content, facesheet stacking sequence and debonding length were discussed in this paper.
The results show that with the increase of MWNTs in core, the natural frequencies of the sandwich structure increased. Different CFRP stacking sequences influenced the natural frequencies and mode shapes. Besides, with the increase of debonding length, the natural frequencies of the sandwich structure decreased more.

摘要
Abstract
致謝
目錄
圖表目錄
第一章 緒論
1.1 研究動機
1.2 文獻回顧
1.3 研究目標
第二章 有限單元與理論分
2.1 有限單元分析
2.2 有限單元振動分析
2.3 實驗數據統計分析
第三章 實驗設備與程序
3.1 實驗設備
3.1.1 製作高分子複材芯材之實驗設備
3.1.2 製作複材疊層板之實驗設備
3.1.3 量測材料常數之實驗設備
3.1.4 量測奈米複材三明治結構振動之設備
3.2 試片製作
3.2.1 高分子奈米複合材料芯材試片製作
3.2.2 複材疊層板試片製作
3.2.3 含脫膠區奈米複材三明治結構試片製作
3.3 材料常數量測
3.3.1 奈米高分子複合材料常數量測
3.3.2 碳纖維疊層板材料常數量測
3.4 三明治試片觀察
3.5 振動實驗
第四章 結果與討論
4.1 材料常數量測結果
4.1.1 奈米高分子複合材料常數量測結果
4.1.2碳纖維疊層板材料常數量測結果
4.2 網格密度測試結果
4.3 二維和三維模型模擬結果比較
4.4 振動實驗結果與模擬結果比較
4.5芯材添加奈米碳管對三明治結構振動影響
4.6面材碳纖維疊層角度對三明治結構振動影響
4.7脫膠區對三明治結構振動影響
4.8 面材碳纖維疊層角度和脫膠區的關係
4.9 振動模態與脫膠區的關係
第五章 結論
參考文獻


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