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系統識別號 U0026-0907201321003900
論文名稱(中文) 尖銳凹槽 6061-T6 鋁合金管在循環彎曲負載下橢圓化分布之研究
論文名稱(英文) The Variation of Ovalization for Sharp-notched 6061-T6 Aluminum Alloy Tubes under Cyclic Bending
校院名稱 成功大學
系所名稱(中) 工程科學系碩博士班
系所名稱(英) Department of Engineering Science
學年度 101
學期 2
出版年 102
研究生(中文) 李建國
研究生(英文) Jian-Guo Li
學號 N96981369
學位類別 碩士
語文別 中文
論文頁數 77頁
口試委員 指導教授-潘文峰
口試委員-陳元方
口試委員-徐建民
口試委員-葉維磬
口試委員-盧俊愷
中文關鍵字 鋁合金  尖銳凹槽  循環彎曲  橢圓化 
英文關鍵字 Aluminum Alloy  Sharp-notched  Cyclic Bending  Ovalization 
學科別分類
中文摘要 本文係針對 6061-T6鋁合金管在中央無凹槽以及具有尖銳凹槽的情況,控制不同對稱曲度循環彎曲負載至皺曲的試驗。實驗試件係採用無尖銳凹槽(0.0 mm)以及五種不同深度(0.4、0.8、1.2、1.6及2.0 mm)的尖銳凹槽6061-T6鋁合金管,在相同曲度速率下(0.012 m-1/s)進行試驗,以求得橢圓化和循環圈數的關係。
本文發現橢圓化-循環圈數的曲線大致可分成三階段,初始、第二及第三階段,而該曲線的趨勢和Lee et al. 【1】所測試不同尖銳凹槽深度304不鏽鋼管的橢圓化-循環圈數曲線非常相似。最後,本文將Lee et al. 【1】所提的理論模式用來描述起始及第二階段的不同尖銳凹槽深度6061-T6鋁合金圓管橢圓化-循環圈數關係。經與實驗結果比較後發現,理論分析能合理的描述實驗結果。
英文摘要 This paper presents the experimental investigation of the buckling of the 6061-T6 aluminum alloy tube with the unnotched and sharp notch subjected to symmetrical curvature-controlled cyclic bending. There are five different sharp-notched depths (0.4, 0.8, 1.2, 1.6 and 2.0 mm) and unnotched (0.0 mm) of 6061-T6 aluminum alloy tubes. The curvature-rate for the experiment is a constant (0.012 m-1/s) for obtaining the relationship between the ovalization and number of cycles.
It can be observed from the experimental curve of the ovalization - number of cycles curve can divide into three stages, the initial, secondary and tertiary stages. It can be seen that the trend of the curve is similar to that tested by Lee et al. 【1】for 304 stainless steel. Finally, the theoretical model proposed by Lee et al. 【1】is used for simulating the ovalization - number of cycles relationship for 6061-T6 aluminum alloy tubes with different sharp-notched depths in initial and secondary stages. By comparing the theoretical simulation with the experimental data, good agreement between the experimental and theoretical results has been achieved.
論文目次 摘 要 ------------------------------------------------------------------------ Ⅰ
Abstract ------------------------------------------------------------------------ Ⅱ
誌 謝 ------------------------------------------------------------------------ Ⅲ
目 錄 ------------------------------------------------------------------------ Ⅳ
表 目 錄 ------------------------------------------------------------------------ Ⅵ
圖 目 錄 ------------------------------------------------------------------------ Ⅶ
符 號 ------------------------------------------------------------------------ XI
第一章 緒論--------------------------------------------------------- 1
1-1 研究動機與背景--------------------------------------------- 1
1-2 文獻回顧------------------------------------------------------ 2
1-3 研究目的------------------------------------------------------ 8
第二章 實驗設備--------------------------------------------------- 10
2-1 彎管實驗機本體--------------------------------------------- 10
2-2 油壓伺服控制系統------------------------------------------ 12
2-3 電腦監控系統------------------------------------------------ 13
2-4 檢測儀器------------------------------------------------------ 15
2-5 實驗原理------------------------------------------------------ 16
2-6 整體效能------------------------------------------------------ 17
第三章 曲度-橢圓化量測裝置---------------------------------------- 27
3-1曲度量測器---------------------------------------------------- 27
3-2橢圓化量測器------------------------------------------------- 28
第四章 實驗方法--------------------------------------------------- 34
4-1 試驗材料------------------------------------------------------ 34
4-2 實驗方式------------------------------------------------------ 34
4-3 實驗流程------------------------------------------------------ 34
4-4 資料收集與整理--------------------------------------------- 36
4-3 注意事項------------------------------------------------------ 39
第五章 實驗結果與理論分析------------------------------------ 45
5-1 循環彎曲之實驗結果--------------------------------------- 45
5-2 理論分析------------------------------------------------------ 47
第六章 結論--------------------------------------------------------- 73
參考文獻 ------------------------------------------------------------------------ 75
參考文獻 1. Shaw, P. K. and Kyriakides, S., 1982, “Inelastic Analysis of Thin-Walled Tubes under Cyclic Bending,” International Journal of Solids and Structures, Vol. 18, pp. 957-973.

2. Kyriakides, S. and Shaw, P. K., 1987, “Inelastic Buckling of Tubes under Cyclic Bending,” Journal of Pressure Vessel Technology, Vol. 109, pp.169-178.

3. Corona, E. and Kyriakides, S., 1988, “On the Collapse of Inelastic Tubes under Combined Bending and Pressure,” International Journal of Solids and Structures, Vol. 24, pp. 505-535.

4. Corona, E. and Kyriakides, S., 1991, “An Experimental Investigation Degradation and Buckling of Circular Tubes under Cyclic Bending and External Pressure,” Thin-Walled Structure, Vol. 12, pp. 229-263.

5. Ju, G. T. and Kyriakides, S., 1992, “Bifurcation Buckling Versus Limit Load Instabilities of Elastic-Plastic Tubes under Bending and External Pressure,” Journal of Offshore Mechanics and Arctic Engineering, Vol. 113, pp. 43-52.

6. Pan, W. F., Wang, T. R. and Hsu, C. M., 1998, “A Curvature-Ovalization Measurement Apparatus for Circular Tubes under Cyclic Bending,” Experimental Mechanics, Vol. 38, No.2, pp. 99-102.

7. Pan, W. F. and Her, Y. S., 1998, “Viscoplastic Collapse of Thin-Walled Tubes under Cyclic Bending,” Journal of Engineering Materials and Technology, Vol. 120, pp. 001-004.

8. Pan, W. F. and Fan, C. H., 1998, “An Experimental Study on the Effect of Curvature-Rate at Preloading Stage on Subsequent Creep or Relaxation of Thin-Walled Tubes under Pure Bending,” JSME International Journal, Series A, Vol. 41, No.4, pp. 525-531.

9. Lee, K. L., Pan, W. F. and Kuo, J. N., 2001, “The Influence of the Diameter-to-Thickness Ratio on the Stability of Circular Tubes under Cyclic Bending,” Solids and Structures, Vol.38, pp. 2401-2413.

10. Lee, K. L., and Pan, W. F., 2002, “Pure Bending Creep of SUS 304 Stainless Steel Tuber,” Steel and Composite Structures - an International Journal, Vol. 2, No.6, pp. 461-474.

11. Lee, K. L., Shie, R. F. and Chang, K. H., 2005, “Experimental and Theoretical Investigation of the Response and Collapse of 316L Stainless Steel Tubes Subjected to Cyclic Bending,” JSME International Journal, Series A, Vol. 48, No.3, pp. 155-162 .

12. Chang, K.H., Pan, W.F. and Lee, K.L., 2008, “Mean Moment Effect on Circular Thin-walled Tubes under Cyclic Bending,” Structural Engineering and Mechanics - an International Journal, Vol. 28, No.5, pp. 495-514.

13. Lee, K. L., Hung C. Y. and Pan, W. F., 2010, “Variation of Ovalization for Sharp-Notched Circular Tubes Under Cyclic Bending,” Journal of Mechanics, Vol. 26, No.3, pp. 403-411.

14. 涂佳銘,2008,「尖銳凹槽薄壁管在循環彎曲負載下橢圓化和循環至皺曲圈數關係之研究」,國立成功大學工程科學研究所碩士論文

15. 黃鈺茜,2009,「橢圓形凹槽薄壁管在循環彎曲負載下橢圓化和循環至皺曲圈數關係之研究」,國立成功大學工程科學研究所碩士論文
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