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研究生:涂佳銘
研究生(外文):Chia-ming Tu
論文名稱: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
論文名稱(外文):The Relationship Between the Ovalization and Number of Cycles to Produce Buckling of Sharp-Notched Thin-Walled Tubes under Cyclic Bending
指導教授:潘文峰
指導教授(外文):Wen-feng Pan
學位類別:碩士
校院名稱:國立成功大學
系所名稱:工程科學系碩博士班
學門:工程學門
學類:綜合工程學類
論文種類:學術論文
畢業學年度:96
語文別:中文
論文頁數:64
中文關鍵詞:皺曲薄壁管橢圓化尖銳凹槽
外文關鍵詞:ovalizationsharp notchbucklingcircular tubecyclic bending
相關次數:
  • 被引用被引用:3
  • 點閱點閱:110
  • 評分評分:
  • 下載下載:7
  • 收藏至我的研究室書目清單書目收藏:0
本文主要探討尖銳凹槽SUS 304不鏽鋼薄壁圓管在對稱循環彎曲負載下的皺曲損壞行為。本文係運用彎管試驗機與曲率-橢圓化量測器來進行不同的曲率控制循環彎曲負載至皺曲的實驗。實驗試件為五種不同尖銳凹槽深度的SUS 304不鏽鋼管。根據實驗結果顯示,凹槽深度越深,橢圓化增加速度越快,也就越快發生皺曲而破壞;同樣地控制曲率越大,橢圓化增加速度亦越快,到達皺曲的循環圈數也就越少。此外,橢圓化量-循環圈數關係圖大致可以分成三個階段,此三個階段皆與單軸潛變的應變-時間關係圖相當類似。最後,根據所測試的實驗結果,本文修改單軸潛變中的Bailey-Norton Law來描述本文中的橢圓化-循環圈數關係圖中的第一階段與第二階段關係。理論分析與實驗的數據比較後顯示,理論能合理的描述實驗結果。
This paper presents the experimental investigation of life at buckling of the circular tubes (SUS 304 stainless steel tubes) with a sharp notch subjected to symmetrical cyclic bending. Tube bending machine and curvature-ovalization measurement apparatus were used to conduct the curvature-controlled cyclic bending to buckling test. There are five kinds of different depth of sharp groove on the middle of SUS 304 stainless steel tubes. It can be observed from the experiment data that the deeper of the notch the less of the number of cycles, the larger of the controlled curvature the less of the number of cycles. In addition, it was found that the experimental curve of the ovalization and the number of cycles to produce buckling could be divided into three stages, the initial, secondary and tertiary stages. These three stages are very similar to the three stages of uniaxial creep. The Bailey-Norton creep formulation was modified so that it can be used to simulate the curve for the initial and secondary stages. By comparing the theoretical simulation with the experimental data, good agreement between the experimental and theoretical results has been achieved.
摘 要 ----------------------------------------------Ⅰ
Abstract ----------------------------------------------Ⅱ
誌 謝 ----------------------------------------------Ⅲ
目 錄 ----------------------------------------------Ⅳ
表 目 錄 ----------------------------------------------Ⅵ
圖 目 錄 ----------------------------------------------Ⅶ
符 號 ----------------------------------------------ΧI

第一章 緒論--------------------------------------------1
1-1 研究動機------------------------------------1
1-2 文獻回顧------------------------------------2
1-3 研究目的------------------------------------6
第二章 實驗設備----------------------------------------8
2-1 彎管實驗機本體------------------------------8
2-2 油壓伺服控制系統----------------------------9
2-3 電腦監控系統-------------------------------10
2-4 檢測儀器-----------------------------------12
2-5 實驗原理-----------------------------------13
2-6 整體效能-----------------------------------14
第三章 曲率-橢圓化量測裝置----------------------------24
3-1管徑檢測器----------------------------------24
3-2曲率檢測器----------------------------------25
第四章 實驗方法---------------------------------------30
4-1 實驗材料-----------------------------------30
4-2 實驗方式-----------------------------------30
4-3 實驗程序-----------------------------------31
4-4 資料收集與整理-----------------------------31
4-5 注意事項-----------------------------------36
第五章 實驗結果與理論分析-----------------------------42
5-1 循環彎曲實驗結果---------------------------42
5-2 理論分析-----------------------------------44
第六章 結論-------------------------------------------58
參考文獻 -----------------------------------------------60
自 述 -----------------------------------------------64
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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.Vaze, P. and Corona, E., 1996, “Degradation and Collapse of Tube under Cyclic Bending,” Thin Wall Structures, Vol. 31, pp. 325-341.

7.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.

8.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.

9.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.

10.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.

11.Lee, K. L. and Pan, W. F., 2001, “Viscoplastic Collapse of Titanium Alloy Tube under Cyclic Bending,” Structural Engineering and Mechanics - an International Journal, Vol. 11, No.3, pp. 315-324.

12.Elchalakani, M., Zhao, X. L. and Grzebieta, R.H., 2001, “Concrete-Filled Circular Steel Tubes Subjected to Pure Bending,” Journal of Constructional Steel Research, Vol. 57 pp. 1141-1168.

13.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.

14.Lee, K. L., Pan, W. F. and Hsu, C. M., 2004, “Experimental and Theoretical Evaluations of the Effect between Diameter-to-Thickness Ratio and Curvature-Rate on the Stability of Circular Tubes under Cyclic Bending,” JSME International Journal, Series A, Vol. 47, No.2, pp. 212-222.

15.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 .

16.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.

17.郭如男,1999,「不同外徑/厚度比薄壁管在循環彎曲負載下皺曲行為之研究」,國立成功大學工程科學研究所碩士論文。
18.李國龍,2000,「圓管在不同外徑/壁厚比及不同曲度率循環彎曲負載下皺曲行為之研究」,國立成功大學工程科學研究所博士論文。

19.陳信嘉,2006,「不同內直徑及外直徑SUS 304不�袗�管在循環彎曲負載下力學行為及皺曲損壞之實驗分析」,國立成功大學工程科學研究所碩士論文。

20.陳立銓,2007,「不同內外直徑圓管在循環彎曲負載下力學行為及皺曲損壞之實驗分析」,國立成功大學工程科學研究所碩士論文。
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