MARC應用於非對稱壓延加工問題之分析

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陳昱良(Yu-Liang Chen) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

MARC應用於非對稱壓延加工問題之分析
(Using the finite element soft MARC to analysis asymmetric rolling.)

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摘要(中)

摘要
由於非對稱壓延具有可有效降低壓延力、材料於壓延製程的安排上，更趨自由及多樣性等優點，於壓延工業上之應用有極大的助益，故本文使用有限元素軟體MARC分析非對稱壓延加工（同徑異周速、異徑同周速、異徑異周速）於乾摩擦條件下之曲率及輥輪壓延力量對壓下率的變化情形，且討論對臨界壓下率之影響。並於異徑條件下考慮入射角度的變化對壓延板材成形之曲率及輥輪壓延力量的影響，及當上、下輥輪表面摩擦不均和輥輪周速不同對壓延加工之影響。

摘要(英)

Abstract
Because asymmetric rolling can decrease the rolling force and arrange of material on rolling arrangement is being free and a lot of variousness, have heavy benefiting at the Engineer. So this paper uses the finite element MARC to analysis asymmetric rolling and process (the same diameter and different week speed, different diameter and the same week speed, different diameter and different week speed), curvature and rolling force for reduction under dry friction condition discuss and cortical reduction influence and different diameter. Consider variable entry angle to curvature of plate forming and effect of rolling force and different surface friction at up and down roller and different roller speed to rolling procedure influence.

關鍵字(中)

★ 曲率
★ 臨界壓下率
★ 壓延力

關鍵字(英)

★ curvature
★ critical reduction
★ rolling force

論文目次

目錄
頁碼
摘要 I
目錄 II
圖表說明 IV
第一章緒論
1- 1 前言 1
1- 2 板材之非對稱壓延 2
1- 3 塑性加工解析法 3
1- 4 研究動機 5
1- 5 文獻回顧 6
第二章基本理論
2-1 彈塑性有限元素基本觀念
2-1-1 有限元素求解程序 10
2-1-2彈塑性材料特性矩陣 11
2-2 Update Lagrangian Formulation(ULF)理論 15
2-3　MARC接觸問題的處理 16
2-3-1 接觸之定義 17
2-3-2 接觸面摩擦效應之處理 19
第三章 MARC有限元素軟體介紹與應用
3-1 MARC程式編輯 21
3-2 MARC分析求解技術定義
3-2-1 參考座標系統 23
3-2-2 非線性代數方程組疊代求解方法 24
3-3 基本假設 25
3-4 MARC應用於壓延成形問題之設定與操作程序
3-4-1 前處理 25
3-4-2 分析 27
3-4-3 後處理 28
3-5收斂檢查 28
第四章結果與討論
4-1實驗驗證 30
4-1-1 同徑異周速壓延 31
4-1-2 異徑同周速壓延 33
4-2異徑異周速壓延 36
4-2-1輥輪摩擦係數的影響 36
4-2-2輥輪周速比的影響 38
第五章結論與建議
5-1 結論 41
5-2 建議 42
參考文獻 43

參考文獻

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