圓環鍛粗異向性變形之分析與研究

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姓名

林晏緹(Yen-Ti Lin) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

圓環鍛粗異向性變形之分析與研究
(The investigation in the deformation of anisotropy for upsetting of ring)

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摘要(中)

對於圓環鍛粗加工而言，除了可以探討模具與胚料間之摩擦效應外，亦可做為評估異向性材料的方法，然而對於鍛粗加工後異向性變形的行為，包含了界面的非均勻摩擦應力條件以及胚料的異向性質：前者屬於加工條件外在的〝養成〞因素，而後者卻屬於材料內在的〝本質〞因素，兩者之間具有交互的效應。本文應用Deform 3D有限元素套裝軟體分析，並利用相關實驗作驗證。來探討由非均勻摩擦及材料異向性特徵對鍛粗工件所引起的異向性變形行為效應。

摘要(英)

For the metal forming, the upsetting of ring can be used to measure the friction effect between die and blank. Besides, it can also discuss the anisotropy of material. The behavior of anisotropic material after upsetting includes the non-uniform friction stress between two interfaces and the anisotropic property of material. The former is the external process while the latter is intrinsic from material. In this paper, Deform 3D finite element software and the related experiment are used to discuss the effect of anisotropic deformation induced by the non-uniform friction and anisotropy factor of material after upsetting process.

關鍵字(中)

★ 異向性
★ 有限元素分析
★ 摩擦
★ 鍛粗

關鍵字(英)

★ finite element analysis
★ anisotropy
★ Upsetting
★ friction

論文目次

摘要 i
Abstract ii
誌謝 iii
目錄 iv
表目錄 vii
圖目錄 viii
第一章緒論 1
1-1 前言 1
1-2 文獻回顧 3
1-2-1摩擦量測 3
1-2-2 桶脹行為 4
1-2-3 非均勻摩擦效應 5
1-2-4 材料異向性探討 6
1-3 研究目的與動機 8
1-4 本文流程架構 9
第二章異向性模型建立 10
2-1摩擦異向性變形模式 10
2-1-1摩擦異向性變形模式建立 11
2-2 材料異向性變形模式 12
2-2-1材料異向性變形模式建立 13
第三章有限元素分析 16
3-1 有限元素法於塑性加工上之應用 16
3-1-1 塑性加工之迭代準則 18
3-2 DEFORM 有限元素軟體 19
3-2-1 DEFORM軟體介紹 19
3-2-2 DEFORM使用流程 22
3-3 DEFORM模擬參數 24
3-3-1 摩擦異向性 26
3-3-2 材料異向性 27
第四章結果與討論 28
4-1 摩擦因子修正曲線圖 28
4-2 端面輪廓 29
4-2-1摩擦異向性 29
4-2-2 材料異向性 31
4-3 側向桶脹 32
4-4 摩擦應力分佈 33
4-4-1摩擦異向性 33
4-4-2材料異向性 34
4-5 正向應力分佈 34
4-5-1摩擦異向性 34
4-5-2材料異向性 35
第五章結論與建議 36
5-1 結論 36
5-2 建議 37
參考文獻 38

參考文獻

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指導教授

葉維磬(Wei-Ching Yeh)

審核日期

2010-7-22

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