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研究生:徐銘俊
研究生(外文):Ming-Chun Hsu
論文名稱:含側向溝槽複合材料平板之破壞準則研究
論文名稱(外文):A Study on the Fracture Criterion of Composite Plates with Lateral Cutouts
指導教授:黃宗立黃宗立引用關係
指導教授(外文):Chung-Li Hwan
學位類別:碩士
校院名稱:逢甲大學
系所名稱:機械工程學所
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:2009
畢業學年度:97
語文別:中文
論文頁數:59
中文關鍵詞:有限元素平均應力準則特徵長度編織複合材料
外文關鍵詞:finite elementbraided compositecharacteristic lengthaverage stress criterion
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本文以有限元素軟體ANSYS配合實驗與彈簧模型理論等探討含側向溝槽之編織複合材料平板破壞現象。首先以彈簧模型理論計算出編織物複合材料之工程模數,再將其工程模數與實驗量測之編織物複合材料極限破壞強度代入有限元素軟體ANSYS中分析,然後得到各種不同孔洞半徑編織物複合材料平板在孔洞邊緣之應力分佈,再利用平均應力準則得到雙邊對稱半圓開孔編織複合材料之特徵長度,最後以最小平方差法建立特徵長度與孔洞半徑之函數曲線關係。實驗證實此函數可以準確地預測其他孔洞半徑之複材平板的特徵長度。
This study uses the finite element software ANSYS, experiment and the spring model theory to investigate the fracture phenomenon of braided composite plates with lateral cutout. First, we calculate the engineering moduli of braided composite plates by means of the Spring Model Method. Secondly, by the use of those calculated engineering moduli and measured fracture strengths of braided composite plates with lateral cutout, ANSYS is applied to obtain the stress distribution around the cutout of braided composite plates with different radius. And, the average stress criterion is then employed to calculate the characteristic lengths for the composite plates with different size of hole. Finally, the functional relationships between characteristic length and radius of cutout are established by the least-square method. These functions are shown to be able to accurately predict the characteristic length of other composite plate with different size of hole experimentally.
中文摘要 …………………………………………………i
英文摘要 …………………………………………………ii
目錄 …………………………………………………iii
圖目錄 …………………………………………………vi
表目錄 …………………………………………………ix


第一章 緒論……………………………………………1
1.1 前言……………………………………………1
1.2 文獻回顧………………………………………4
1.3 研究動機與目的………………………………7
1.4 本文章節提要…………………………………8

第二章 相關理論………………………………………9
2.1 特徵長度與平均應力準則(ASC) ……………9
2.2 彈簧模型………………………………………11
2.3 有限元素法……………………………………13
2.4 單位格子設定…………………………………15
2.5 單位格子之平均應變與平均應力……………17
2.5.1 平均應變………………………………………17
2.5.2 平均應力………………………………………18
2.6 彈性模數之計算………………………………22
2.7 基材模數之調整………………………………23

第三章 試片製作與拉伸實驗…………………………24
3.1 實驗材料與儀器設備…………………………24
3.2 實驗步驟與流程………………………………27
3.3 拉伸測試………………………………………30
3.4 纖維波型………………………………………34
3.5 複合材料纖維體積含有率測試………………36

第四章 有限元素軟體分析……………………………38
4.1 有限元素法與ANSYS介紹 ……………………38
4.2 分析流程與元素設定…………………………39
4.2.1 前處理…………………………………………40
4.2.2 後處理…………………………………………43

第五章 結果與討論……………………………………45
5.1 破壞模式………………………………………46
5.1.1 巨觀破壞模式…………………………………47
5.1.2 微觀破壞模式…………………………………47
5.2 應力分佈………………………………………49
5.3 孔洞半徑與特徵長度之關係…………………51

第六章 結論……………………………………………55

參考文獻 …………………………………………………56
1.許明發,柯澤豪,劉顯光,郭文雄, “複合材料入門” ,中華 民國尖端材料科技協會,2005。
2.Lee W. Gause and Janmes M. Alper, “Structure Properties of Braided Graphite/Epoxy Composites,” J. of Composites Technology & Research, Vol. 9, 1987, pp. 141-150.
3.J.M. Whitney and R.J. Nuismer, “Stress Fracture Criteria for Laminated Composites Containing Stress Concentration,” Journal of Composite Materials, Vol. 8, 1974, pp. 253-265.
4.R.F. Karlak, “Hole Effects in a Series of Symmetrical Laminates,” Proceeding of a Conference on Failure Modes in Composite (III), American Society for Metals, Chicago, 1977.
5.R.B. Pipes, R.C. Wetherhold, and J.W. Gillespie, Jr., “Notched Strength of Composite Materials,” Journal of Composite Materials, Vol. 13, 1979, pp. 148-160.
6.Paul J. Fabon and Israel Herszberg, “Mechanical Performance of 2D Braided Carbon/Epoxy Composites,” Comp. Sci. Technol., Vol. 58, 1998, pp. 253-265.
7.Vincenzo Savino and Tsu-Wei Chou, “Mechanical Characterization of Triaxially Braided Hybrid Composites,” Polymer Composites, Vol. 19, No. 4, 1998, pp. 473-486.
8.Chow C.L and Yang Fan, “Three-Dimensional Inelastic Stress Analysis of Center Notched Composite Laminates with Damage,” International Journal of Damage Mechanics, Vol. 6, 1997, pp. 23-50.
9.Nguyen Ba Nghiep, “Three-Dimensional Modeling of Damage in Laminated Composites Containing a Central Hole,” Journal of Composite Materials, Vol. 31, 1997, pp. 1672-1693.
10.Pradhan S.C. and Tay T.E., “Three-Dimensional Finite Element Modeling of Delamination Growth in Notched Composite Laminates under Compression loading,” Engineering Fracture Mechanics, Vol. 60, 1998, pp. 157-172.
11.Hafiani, F. and Dwyer, J.F., “Edge Function Analysis of Anisotropic Materials with Holes and Cracks,” Computers and Structures, Vol. 72, 1999, pp. 779-791.
12.Asami Nakai, Takeru Ohki, Nobuo Takeda and Hiroyuki Hamada, “Mechanical Properties and Micro-fracture Behaviors of Flat Braided Composites with a Circular Hole,” Composite Structure, Vol. 52, 2001, pp. 315-322.
13.J.P. Davim and Pedro Reis, “Study of Delamination in Drilling Carbon Fiber Reinforced Plastics (CFRP) Using Design Experiments,” Composite Structures, Vol. 59, 2003, pp. 481-487.
14.Chang, F.K. and K.Y. Chang, “A Progressive Damage Model for Laminated Composites Containing Stress Concentration,” J. of Composite Materials, Vol. 21, 1987, pp. 834-855.
15.R.Karakuzu, A.Ozel, and O.Sayman, “Elastic-plastic finite element analysis of metal matrix plates with edge notches,” Computers and Structures, Vol. 63, No. 3, 1997, pp. 551-558.
16.T. Achour, B. Bachir Bouiadjra, B. Serier, “Numerical Analysis of the Performances of the Bonded Composite Patch for Reducing Stress Concentration and Repairing Cracks at Notch,” Computational Materials Science, Vol. 28, 2003, pp. 41-48.
17.N. Troyani, S.I. Herna’ndez, G. Villarroel, Y. Pollonais, and C. Gomes, “Theoretical Stress Concentration Factors for Short Flat Bars with Opposite U-shaped Notches Subjected to In-plane Bending, ” International Journal of Fatigue, Vol. 26, 2004, pp. 1303-1310.
18.Lotfi Toubal, Moussa Karama and Bernard Lorrain, “Stress Concentration in a Circular Hole in Composite Plate,” Composite Structure, Vol. 68, 2005, pp. 31-36.
19.Christopher Wonderly, Joachim Grenestedt, Goran Fernlund and Elvis Cepus, “Comparison of Mechanical Properties of Glass Fiber/Vinyl Ester and Fiber/Vinyl Ester Composites,” Composites: Part B, Vol. 36, 2005, pp. 417-426.
20.Mevlut Tercan, Osman Asi and Alaattin Aktas, “Determination of the Critical Length of Notched Weft-knitted Glass Fiber Variable Width Composite Plates,” Composite Structures, Vol. 77, 2007, pp. 111-119.
21.D. Ouinas, B.B. Bouiadjra, B. Serier and M. SaidBekkouche, “Comparison of the Effectiveness of Boron/Epoxy and Graphite/Epoxy Patches for Repaired Cracks Emanating from a Semicircular Notch Edge,” Composite Structure, Vol. 80, 2007, pp. 514-522.
22.Sangwook Sihn, Ran Y. Kim, Kazumasa Kawabe and Stephen W. Tsai, 2007, “Experimental Studies of Thin-ply Laminated Composites,” Composites Science and Technology, Vol. 67, No. 6, pp. 996-1008.
23.H.A. Whitworth, O. Aluko, N.A. Tomlinson, “Application of the Point Stress Criterion to the Failure of Composite Pinned Joints,” Engineering Fracture Mechanics, Vol.75, 2008, pp.1829-1839.
24.ANSYS Inc., ANSYS Release 10.0 Documentation: Element Reference – Element Library, 2006.
25.王楚明, “含缺口複合材料之損傷行為研究” ,台灣大學機械工程研究所博士論文,2001,Page 38。
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