MARC應用於雙金屬圓管擠製加工問題之分析

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謝建成(Jian-Cheng Xie) 查詢紙本館藏

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機械工程學系

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)

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摘要(中)

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。

摘要(英)

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.

關鍵字(中)

★ 破壞
★ 有限元素法
★ 雙金屬圓管
★ 擠製

關鍵字(英)

★ fracture
★ finite element
★ bi-metal tube
★ extrusion

論文目次

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

參考文獻

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指導教授

葉維磬(Wei-Ching Yeh)

審核日期

2005-7-14

推文