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研究生： 謝建成
Jian-Cheng Xie
論文名稱： MARC應用於雙金屬圓管擠製加工問題之分析
Using the finite element soft MARC to analysis the extrusion of bi-metal tube
指導教授： 葉維磬
Wei-Ching Yeh
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
畢業學年度： 93
語文別： 中文
論文頁數： 121
中文關鍵詞： 破壞 、有限元素法 、雙金屬圓管 、擠製
外文關鍵詞： fracture, finite element, bi-metal tube, extrusion
相關次數： 點閱：16  下載：0 
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    • 本文應用有限元套裝軟體MARC分析雙金屬圓管擠製問題。為瞭解MARC應用於擠製加工問題的妥適性及選用Cockroft-Latham 準則預測擠製加工之缺限產生的精確性，本文首先依據Chitkara與Aleem[4]之實驗結果驗證有限元素套裝軟體MARC對於雙金屬圓管擠製加工分析之可靠性，接著再依Ko等人[15]之實驗結果驗證有限元素套裝軟體MARC採用Cockroft-Latham準則預測對擠製及鍛粗加工破壞產生的精確性後，則進一步分析加工參數（模具半角、面積縮減率、摩擦條件、蕊材和環狀襯套強度比及面積比）對於蕊材破壞及環狀襯套破壞之影響。

    This article uses the finite element soft MARC to analysis extrusion of bi-metal tube. In order to understand that it is suitable for using MRAC to analysis extrusion of bi-metal tube and adopting Cockroft-Latham principle to predict the fracture in extrusion process, first this article proves the trusty of the experiment result [4] in extrusion of bi-metal tube process by using MARC analysis. Secondly, this article proves the accuracy of the experiment result [15] in extrusion and upsetting process by using MARC analysis adopting Cockroft-Latham principle. This article analysis the manufacturing parameters like semi-die angle, the reduction of area, friction condition and etc. to counter with the effect of the core fracture and sleeve fracture.

    摘要　　　　　　　　　　　　　　　　　　　　　　　　　　 I 目錄　　　　　　　　　　　　　　　　　　　　　　　　　 II 圖表說明　　　　　　　　　　　　　　　　　　　　　　　 Ⅴ 符號說明 XII 第一章 緒論　　　　　　　　　　　　　 　　　1-1 前言　　　　　　　　　　　　　　　　　　　　　 1 1-2 文獻回顧　　　　　　　　　　　　　　　　　　　 3 1-3 研究動機　　　　　　　　　　　　　　　　 6 第二章 基本理論 2-1有限元素法基本觀念 8 2-2 Update Lagrangian Formulation(ULF)介紹 12 2-3破壞理論 13 2-4材料性質定義模式 15 2-5接觸問題之定義 16 2-6網格重新劃分 18 2-7求解非線性代數方程式的方法 19 第三章 MARC有限元素軟體介紹 3-1基本假設 21 3-2 MARC之架構與各部分功能的介紹 22 3-3 MARC應用於擠製問題的設定與操作程序 23 3-4 MARC之摩擦效應 25 3-5收斂檢查 26 第四章 結果與討論 4-1實驗驗證 29 4-1-1實驗1 29 4-1-2實驗2 33 4-2材料破壞準則 36 4-3蕊材破壞之分析 38 4-3-1模具半角及面積縮減率的影響 38 4-3-2強度係數比的影響 38 4-3-3摩擦條件的影響 39 4-3-4蕊材面積比的影響 40 4-3-5蕊材改變的影響 41 4-4環狀襯套破壞之分析 42 4-4-1模具半角及面積縮減率的影響 43 4-4-2強度係數比的影響 43 4-4-3摩擦條件的影響 43 4-4-4環狀襯套面積比的影響 45 4-4-5環狀襯套改變的影響 46 第五章 結論與建議 5-1結論 47 5-2建議 49 參考文獻 50 附錄 117

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