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研究生:陳晟鉢
研究生(外文):Cheng-Po Chen
論文名稱:三次元正交型複合材料振動與壓縮破損性質
論文名稱(外文):Vibration and Compressiv Damage Properties of Three-Dimensional Orthogonal omposites
指導教授:郭文雄郭文雄引用關係
指導教授(外文):Wen-Shyong Kuo
學位類別:碩士
校院名稱:逢甲大學
系所名稱: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:2001
畢業學年度:89
語文別:中文
中文關鍵詞:3D複合材料碳/環氧樹脂振動性質壓縮破壞
外文關鍵詞:3D compositescarbon/epoxyvibration properitesconpressive failure
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本文使用碳纖維編成三次元正交型織物補強環氧樹脂製作而成之複合材料,主要的目的是改變織物表面之交織圈型態,進而分析其振動特性與壓縮破損性質並且觀察其微觀結構。
三次元正交型碳/環氧樹脂複合材料經振動量測後發現,纖維含有率較低者其阻尼比愈高,但無編織紗補強且纖維含有率最低者其阻尼比卻最低,因此我們知道編織紗的補強具吸振效果。較為分散對稱的交織圈結構可以提高其纖維含有率以及機械性質。受壓縮破壞時各試片均有挫曲現象(bucking),一連串的挫曲形成稱之為挫曲帶(kink band)。
顯微觀察中發現,織物表面之交織圈對於壓縮破壞型態有著絕對性的影響。所有的破壞幾乎是沿著交織圈斜向前進。交織圈能夠緊緊的扣住軸向紗,使其不易產生挫曲而造成破壞。當裂縫成長至交織圈時,交織圈能夠有效的阻止裂縫的成長或改變裂縫路徑;沒有交織圈的地方裂縫會繼續成長。

In this work, the carbon fibers and epoxy resin were used to make the 3-axis, orthogonal fabric composites. The weaving steps and the resulting loop pattern have been changed, in order to assess the influence of the surface loops on the resulting vibration and compressive behavior.
The results showed that the 3D carbon/epoxy composite has a higher damping ration when the fiber volume fraction is lower. However, the specimens composed of the pure matrix showed the lowest damping ratio, because this material lacks the internal friction between fiber and matrix. Several types of fabrics have been made, and it is found that the one with a symmetric loop structure has the highest compressive strength. One reason is that its loop density is the highest. The microscopic observations also indicated that the micro-buckling of the fibers form an inclined kink-band, which is the major mode of the compressive failure.
The observations also indicated that the surface loops strongly influence the damage behavior. Nearly all the specimens show failure along the loops. Because the loops are able to hold and cover the axial yarns, the protected axial yarns become more capable in resisting the compression without forming the kink-bands. The cracks are thus more likely to grow along the paths without the loops.

中文摘要
英文摘要
目錄
圖目錄
表目錄
符號意義
第1章 前言
1.1 引言
1.2 研究動機
第2章 理論
2.1 織物結構之設計
2.2 理論纖維體積含有率
2.3 環氧樹脂之硬化反應
2.4 振動測試理論
2.4.1 振動簡介
2.4.2 振動測試
2.4.3 頻率響應函數
2.4.4 阻尼之計算
2.4.5 樑之理論模型
第3章 實驗
3.1 實驗材料
3.2 實驗儀器
3.3 實驗流程
3.4 三次元正交型織物之編織路徑
3.5 編織機台之介紹
3.6 試片製作步驟
3.7 試片編號及尺寸
3.8 碳/環氧樹脂複合材料之測試
3.8.1 試片密度之測量
3.8.2 纖維體積含有率
3.9 振動量測實驗
3.10 壓縮測試
3.11 光學顯微鏡之觀察
第4章 結果與討論
4.1 試片之幾何結構分析
4.2 理論纖維含有率與實測纖維含有率
4.3 振動量測
4.3.1 自然頻率量測
4.3.2 阻尼比之量測
4.3.3 試片之振動模態
4.4 壓縮測試分析
4.4.1 壓縮破損分析
4.4.2壓縮測試後之顯微觀察
第5章 結論
參考文獻
作者簡介與致謝

1.Wen-Shyong Kuo, The role of loops in 3D fabric composites, Composites Science and Technology, Vol.60 (2000) pp.1835-1849
2.Guoyi Tang, Yunjie Yan, Xihua Chen, Jin Zhang, Bin xu, Zhihai Feng, Dynamic damage and fracture mechanism of Three-dimensional braided carbon fiber/epoxy resin composites, Materials and Design, Vol.22 (2001) pp.21-25
3.He-Jun Li, Xiang-Hui Hou, Yi-Xi Chen, Densification of unidirectional carbon-carbon composites by isothermal chemical vapor infiltration, Carbon, Vol.38 (2000) pp.423-427
4.K. A. Stevens, R. Ricci and G. A. O Davies, Buckling and postbuckling of composite structures, Composites, Vol.26 (1995) pp.189-199
5.K. Padmanabhan and Kishore, Failure behaviour of carbon fibre/epoxy composites in pin-ended buckling and bending tests, Composites, Vol.26 (1995) pp.189-199
6.Martin Cerný, Petr Glogar, Lalit M. Manocha, Resonant frequency study of tensile and shear elasticity moduli of carbon fibre reinforced composites (CFRC), Carbon, Vol.38 (2000) pp.2139-2149
7.Z. X. Tang, R. Postle, Mechanics of three-dimensional braided structures for composite materials — part I: fabric structure and fibre volume fraction, Composite structures, Vol.49 (2000) pp.451-459
8.Paul J. Falzon and Israel Herszberg, Mechanical Performance of 2-D Braided Carbon/Epoxy Composites, Composites Science and Technology, Vol.58 (1998) pp.253-265
9.Karthik Ramani, Harshad Borgaonkar and Chris Hoyle, Experiments on compression moulding and pultrusion of thermoplastic powder impregnated towpregs, Composites Manufacturing, Vol.6 (1995) pp.35-43
10.Joon-Hyung Byun, The analytical characterization of 2-D braided textile composites, Composites Science and Technology, Vol.60 (2000) pp.705-716
11.Ping Tan, Liyong Tong, G.P. Steven, Takashi Ishikawa, Behavior of 3D orthogonal woven CFRP composites. Part I. Experimental investigation, Composites: Part A, Vol.31 (2000) pp.259—271
12.許明發, 郭文雄, 複合材料, 1998
13.馬振基, 高分子複合材料, 1993
14.垣內弘, 環氧樹脂應用實務, 1981
15.尤介男, 三次元正交型碳/環氧樹脂複合材料之製成與破損分析, 逢甲大學紡織工程研究所碩士論文, 1997
16.W.T. Thomson, Theory of Vibration with Application, 1985
17.Ronald F. Gibson, Modal vibration response measurements for characterization of composite materials and structures, Composites Science and Technology, Vol.60(2000) pp.2769-2780
18.周專成, 尼龍6非織物夾層複合材之研究, 逢甲大學紡織工程研究所博士論文, 1997

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