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研究生:林琮源
研究生(外文):Tsung-YuanLin
論文名稱:尖銳凹槽圓管在純彎曲負載下鬆弛行為之實驗研究
論文名稱(外文):Experimental Study on Relaxation Response of Sharp-Notched Circular Tubes Under Pure 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
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:76
中文關鍵詞:尖銳凹槽單調純彎曲鬆弛行為
外文關鍵詞:sharp-notchedpure bendingrelaxation
相關次數:
  • 被引用被引用:0
  • 點閱點閱:141
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  • 下載下載:1
  • 收藏至我的研究室書目清單書目收藏:0
本文利用彎管實驗機對尖銳凹槽深度分別0.2、0.4、0.6、0.8及1.0 mm的SUS304無縫不銹鋼圓管,進行單調純彎曲鬆弛行為的實驗研究。而純彎曲鬆弛係指彎曲圓管至某個曲度量後,維持該曲度量一段長時間。至於本研究純彎曲鬆弛的控制曲度分別考慮:0.05、0.1及0.15 。
實驗結果顯示,尖銳凹槽SUS304不鏽鋼圓管承受純彎曲鬆弛負載時,彎曲力矩會急速下降,而後趨於穩態,而橢圓化也會迅速增加,而後趨於穩態。最後,本文提出兩個方程式分別來描述彎矩-時間及橢圓化-控制曲度的關係。在與實驗結果比較後發現,理論分析可合理的描述實驗結果。
In this study, the tube bending machine is used to conduct the pure bending relaxation for SUS 304 stainless steel tubes with the sharp notch depths of 0.2, 0.4, 0.6, 0.8 and 1.0 mm. The pure bending relaxation is to bend the tube to a desired curvature and keep that curvature for a period of time. As for this research, the controlled curvature of the pure bending relaxation are considered to be 0.05, 0.1 and 0.15 .
It is shown from experimental data that the bending moment drops rapidly and becomes steady, and the ovalization increases rapidly and becomes steady for sharp-notched SUS 304 stainless steel tubes subjected to pure bending relaxation. Finally, two formulations are proposed for simulating the moment-time and ovalization-controlled curvature relationships. When compares with the experimental finding, the theoretical analysis can reasonably simulate the experimental data.

摘要I
AbstractII
誌謝III
目錄IV
表目錄VII
圖目錄VIII
符號說明XI
第一章 緒論1
1–1 研究背景與動機1
1–2 文獻回顧2
1–3 研究目的9
第二章 實驗設備11
2-1 實驗設備11
2–2 彎管實驗機台11
2–3 油壓伺服系統14
2–4 電腦監控系統18
2–5 彎管機的效能20
第三章 檢測儀器裝置與原理30
3-1 檢測儀器裝置30
3-1-1 荷重檢測器(Load cell) 31
3-1-2 曲度–橢圓化量測器(COMA)31
3-2 檢測儀器原理35
3-2-1 彎曲力矩(Moment,M)35
3-2-2 橢圓化(Ovalization) 36
3-2-3 彎曲曲度(Curvature,κ)36
第四章 實驗原理與方式44
4-1 彎管原理44
4-2 實驗方式45
4-3 試件材料45
4-4 操作流程46
4-5 注意事項50
第五章 實驗結果與理論分析56
5-1 純彎曲鬆弛負載前之力矩與曲度關係56
5-2 純彎曲鬆弛負載前之橢圓化與曲度關係 56
5-3純彎曲鬆弛負載之力矩與時間關係57
5-4 純彎曲鬆弛負載之橢圓化與時間關係58
5-5 理論分析58
第六章 結論71
參考文獻73
自述76

1.Shaw, P. K. and Kyriakides, S., 1985, “Inelastic Analysis of Thin-Walled Tubes under Cyclic Bending, International Journal of Solids and Structures, Vol. 21, pp. 1073-1100.
2.Shaw, P. K. and Kyriakides, S. , 1987, “Inelastic Buckling of Tubes Under Cyclic Bending, ASME, Journal of Pressure Vessel Technology, Vol. 109, pp. 169-178.
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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.Haque, M.N., Langrish, T. A. G., Keep, L-B. and Keey, R. B., 2000, “Model fitting for visco-elastic creep of Pinus radiata during kiln drying, Wood science and Technology, Vol. 34, pp. 447-457.
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, International Journal of Solids and Structures, Vol.38, pp. 2401-2413.
11.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.
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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 .
13.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.
14.黃鈺茜,2009,「橢圓形凹槽圓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.翁弘杰,2011,「尖銳凹槽圓管在循環彎曲負載下平均曲度對皺曲行為影響之實驗研究」,國立成功大學工程科學研究所碩士論文。

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