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研究生：	黃豪義 Huang, Hao-Yi
論文名稱：	脫層應力強度因子之計算方法 Effective Methods for Calculating the Delamination Stress Intensity Factors
指導教授：	胡潛濱 Hwu, Chyanbin
學位類別：	碩士 Master
系所名稱：	工學院 - 航空太空工程學系 Department of Aeronautics & Astronautics
論文出版年：	2006
畢業學年度：	94
語文別：	中文
論文頁數：	73
中文關鍵詞：	H積分、對數近似、脫層、J積分
外文關鍵詞：	delamination, J-Integral, H-Integral, logarithm approximation, definition
相關次數：	點閱：133 下載：3
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　　本文之主要目的在提出一可靠、穩定且高效率之脫層應力強度因子之計算方法，由於一般複合材料疊層之厚度極薄，傳統上計算方式運用定義式計算脫層應力強度因子，皆會遭遇邊界效應之影響，以致再細緻之網格都很難求得收斂之結果。為解決此一問題，在文獻上曾提及奇異元素法、對數近似法、J積分法、H積分法等，藉由實例分析，從而建議H積分為一可靠、穩定且高效率之計算方式。

The main purpose of this dissertation is to put forward a reliable, stable and high-efficiency computing method for delamination stress intensity factors (SIF). Because the thickness of each layer of composite laminate is extremely thin, commonly used SIF calculations by definitions will be greatly influenced by boundary effect. Hence convergence of results is very difficult to obtain no matter how subtle the mashes are. In order to solve this problem, methods such as H-Integral, singular element, logarithm approximation, J-Integral, etc. mentioned previously in some literatures had been implemented in actual case analyses. From these results we conclude and propose that H-Integral is a reliable, stable and high-efficiency calculating tool.

致謝
摘要
英文摘要

目錄...................................................................................................... i
表目錄.................................................................................................. iii
圖目錄.................................................................................................. iv
符號說明.............................................................................................. vi

第一章 緒論......................................................................................... 1
§1.1 前言............................................................................................... 1
§1.2 文獻回顧....................................................................................... 1
§1.3 研究動機與目的........................................................................... 2
§1.4 論文架構....................................................................................... 4

第二章 數種計算應力強度因子方法之簡介..................................... 5
§2.1 定義式逼近法............................................................................... 5
2.1.1應力逼近法................................................................................... 5
2.1.2位移逼近法................................................................................... 7
§2.2 對數近似法................................................................................... 7
§2.3 ANSYS內建指令........................................................................... 10
§2.4 J積分法.......................................................................................... 10
§2.5 H積分法......................................................................................... 12
2.5.1均質裂縫問題................................................................................ 13
2.5.2界面裂縫問題................................................................................ 15

第三章 模擬分析.................................................................................. 19
§3.1 材料座標轉換................................................................................ 19
§3.2 ANSYS分析.................................................................................... 21
§3.3 建縮模式建立................................................................................ 23
§3.4 複合材料疊層間之等效混合........................................................ 25

第四章 數值結果.................................................................................. 26
§4.1 均質裂縫....................................................................................... 26
4.1.1收斂性探討................................................................................... 26
4.1.2邊緣裂縫於試片兩端受均佈張力............................................... 27
4.1.3含邊緣裂縫方板一端受均佈剪力另一端固定........................... 27
4.1.4含邊緣傾斜裂縫方板於兩端緣受均佈張力............................... 27
4.1.5均質方形板之厚度漸縮............................................................... 28
§4.2 界面裂縫....................................................................................... 28
4.2.1複材疊層板之厚度漸縮............................................................... 29
4.2.2 疊層板.......................................................................................... 29
4.2.3 複材疊層板等效混合.................................................................. 30

第五章 結論.......................................................................................... 31
§5.1 結論............................................................................................... 31
§5.2 建議............................................................................................... 32
§5.3 後續研究方向............................................................................... 33

參考文獻............................................................................................... 34
附表....................................................................................................... 37
附圖....................................................................................................... 47
自述....................................................................................................... 74

                                    

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校外：2006-08-23公開

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