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 本文旨在研究孔洞對裂紋漸近場高階參數之影響，文中首先推演均質正交異向性材料在裂縫尖端的應力與位移含高階參數之漸近場表達式，其後介紹最小二乘法原理與配合應用ABAQUS軟體進行高階項係數之計算，數值範例中探討了均質正交異向性材料裂縫體，受拉應力或剪應力作用下孔洞對高階項係數之影響，高階項係數數值計算之收斂性和精確度也做了討論與比較。
 The aim of this research is to study the influence of a hole on high-order parameters of near-tip fields of a crack .First of all, the expression of the asymptotic stress and displacement fields including the high-order parameters of a crack tip are introduced for an orthotropic material. After that, the Least-squares method is introduced along with the use of ABAQUS software to calculate high-order parameters.The influence of holes on high-order parameters are studied by several numerical examples where the cracked orthotropic material is subjected to tensile stress or shear stress.The convergence and accuracy of the numerical computations of high-order parameters are also discussed and compared.
 摘要…………………………………………………………………………IAbstract…………………………………………………………………II誌謝………………………………………………………………………III目錄………………………………………………………………………IV表目錄……………………………………………………………………VII圖目錄……………………………………………………………………XII第一章 緒論………………………………………………………………1 1-1前言………………………………………………………………1 1-2文獻回顧…………………………………………………………2 1-3本文綱要…………………………………………………………3第二章 基本公式…………………………………………………………5 2-1異向性材料應力與應變關係式…………………………………5 2-2應力和應變轉換…………………………………………………9第三章 破壞力學相關理論……………………………………………12 3-1裂縫尖端的平面位移漸近場和應力漸近場……………………12 3-2應力強度因子及T-stress之推演………………………16 3-3最小二乘法算應力強度因子及高階參數………………………19第四章 有限元素分析……………………………………………………244-1奇異元素(Singularity element)…………………………………24 4-2套裝軟體:ABAQUS 6.8-1……………………………………28第五章 數值模擬結果與討論……………………………………………36 5-1驗證基準問題……………………………………………………36 5-2驗證中央裂縫平板(Center-cracked plate)問題……………36 5-2-1均質材料純Mode I範例……………………………………36 5-2-2均質材料純Mode II範例…………………………………40 5-2-3均質材料Mixed-Mode範例………………………………42 5-2-4驗證他人相關研究…………………………………………47 5-3正交異向性材料裂縫之平板問題………………………………49 5-3-1驗證均質正交異向性材料單邊裂縫……………………49 5-3-2驗證均質正交異向性材料中央斜裂縫………………...…….52 5-4平板之裂縫含孔洞問題…………………………………………54 5-4-1驗證均質等向性材料Mode I裂縫含孔洞…………………54 5-4-2均質正交異向性材料Mode I裂縫含孔洞…………………57 5-4-3均質正交異向性材料Mode II裂縫含孔洞………………67 5-5項數多寡與節點數量對係數準確性的影響……………………77 5-6網格切割的疏密對 係數的影響……………………………79第六章 結論………………………………………………………………82參考文獻…………………………………………………………………84
 [1]Ayatollahi, M.R. and Nejati, M., An over-deterministic method for calculation of coefficient of crack tip asymptotic field from finite element analysis. Fatigure and Fracture of Engineering Materials and Structures, Vol.34, 159-176, 2010.[2]Chen, K.L. and Atluti, S.N., Comparison of different methods of evaluation of weight functions for 2-D mixed-mode fracture analyses. Egineering Fracture Mechanics, Vol.34, 935-956, 1989.[3]Chu, S.J. and Hong, C.S., Application of the integral to mixed mode crack problems for anisotropic composite laminates. Egineering Fracture Mechanics, Vol.35, 1093-1103, 1990.[4]Hasebe, N. and Ueda, M., Crack originating from a corner of a square hole. Egineering Fracture Mechanics, Vol.13, 913-923, 1980.[5]Ju, S.H., Simulating stress intensity factors for anisotropic materals by the least-squares method. International Journal of Fracture, Vol.81, 283-297, 1996.[6]Khalil, S.A., Sun, C.T. and Hwang, W.C., Application of a hybrid finite element method to determine stress intensity factors in unidirectional composites. International Journal of Fracture, Vol.31, 37-51, 1986.[7]Lee, L.J. and Wang, C.H., Stress intensity factors by weight function method for cracked composite laminates. Egineering Fracture Mechanics, Vol.48, 267-279, 1994.[8]Ashari, S.E. and Mohammadi, S., Delamination analysis of composites by new orthotropic biomaterial extended finite element method. International Journal for numerical methods in engineering, Vol.86, 1507-1543, 2011.[9]Rice, J.R., A path independent integral and the approximate analysis of strain concentration by notches and cracks. Journal of Applied Mechanics, Vol.35, 379-386, 1968.[10]Rao, B.N. and Rahman, S., An interaction integral method for analysis of cracks in orthotropic functionally graded materials. Computational Mechanics, Vol.32, 40-51, 2003.[11]Sih, G.C., Paris, P.C. and Irwin, G.R., On cracks in rectilinearly anisotropic bodies. International Journal of Fracture, Vol.1, 189-203, 1965.[12]Su, R.K.L. and Fok, S.L., Determination of coefficients of the crack tip asymptotic field by fractal hybrid finite elements. Egineering Fracture Mechanics, Vol.74, 1649-1664, 2007.[13]Tweed, J. and Rooke, D.P., The distribution of stress near the tip of a radial crack at the edge of a circular hole. International Journal Egineering Science, Vol.11, 1185-1195, 1973.[14]Tweed, J. and Rooke, D.P., The stress intensity factor for a crack at the edge of a loaded hole. International Journal Solids Structures, Vol.15, 899-906, 1979.[15]Yum, Y.J. and Hong, C.S., Stress intensity factors in finite orthotropic plates with a crack under mixed mode deformation. International Journal of Fracture, Vol.47, 53-67, 1991.[16]Yan, X., An empirical formula for stress intensity factors of cracks emanating from a circular hole in a rectangular plate in tension. Engineering Failure Analysis, Vol.14, 935-940, 2007.[17]葉庭恩, 異向性界面裂紋分叉行為之研究. 國立成功大學土木工程研究所碩士論文. 2003.
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 1 異向性界面裂紋分叉行為之研究 2 應用振幅變動電子光斑影像干涉術探討含缺陷複材平板之振動特性 3 正交性複合材料中裂縫前端的微觀尺度應力強度因子 4 應用數位相機發展非接觸式量測技術及建立自動化運算程式 5 非均勻應力分佈在鋼板中之疲勞裂縫進展行為探討 6 漸開線正齒輪應力分析 7 鋼構填角銲搭接接頭應力強度因子之研究 8 鈍化裂縫前端彈塑性變形之探討 9 異向彈性狹長條內裂縫之分析 10 含有限長裂紋之雙異質壓電複合層板動力破壞分析 11 含一近表面裂縫半無窮平板之應力分析 12 有限平板多條邊裂紋成長之探討 13 利用數位影像相關法量測鋼結構常見填角銲接頭之應力強度因子 14 垂直纖維方向裂縫的微觀尺度應力強度因子 15 鋼管銲接接頭應力強度因子之研究

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