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研究生: 張浩元
Chang, Hao-Yuan
論文名稱: 圓管在循環彎曲負載下平均彎矩對皺曲行為影響之實驗研究
Experiment Investigation for The Buckling of Circular Tubes with Different Mean Moment under Cyclic Bending
指導教授: 潘文峰
Pan, Wen-Fung
學位類別: 碩士
Master
系所名稱: 工學院 - 工程科學系
Department of Engineering Science
論文出版年: 2003
畢業學年度: 91
語文別: 中文
論文頁數: 83
中文關鍵詞: 彎矩比平均彎矩圓管
外文關鍵詞: moment ratio, mean moment, circular tube
相關次數: 點閱:90下載:4
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  •   本文利用『彎管實驗機』及『曲度-橢圓化量測器』對D/t比為60的SUS 304無縫不銹鋼圓管試件進行不同彎矩比的循環彎曲負載實驗,並利用彎矩比來描述平均彎矩對皺曲行為影響之研究。彎矩比的影響是以r值來定義,其中r為最小彎矩量除以最大彎矩量。本文針對r=-1、r=-0.5及r=0的三種彎矩比,在固定的加載率下,控制不同的彎矩範圍,來觀察彎矩比、循環至皺曲次數、曲度及橢圓化四者間的變化關係。  
      由實驗結果顯示,當圓管受循環彎曲負載時,在固定的彎矩範圍(ΔM)控制值下,r越小時,則皺曲行為發生所需的圈數越多;當循環彎曲的彎矩設定值越大,則橢圓化的變化量也會越大,但循環至皺曲所需的圈數卻會越少。此外,在循環彎曲負載時,最初會有循環硬化的情形發生,管徑亦呈現橢圓化的情形,隨著循環次數的增加,彎曲力矩與彎曲曲度的關係趨近於穩定,而管徑橢圓化亦有增加的趨勢,但增加的趨勢逐漸緩和。

    摘要 …………………………………………………………I 誌謝 …………………………………………………………II 目錄 …………………………………………………………III 表目錄 ………………………………………………………VI 圖目錄 ………………………………………………………VII 符號說明 ……………………………………………………XI 第一章 緒論  ………………………………………………1 1-1 前言 ……………………………………………………1 1-2 文獻回顧 ………………………………………………3 1-3 研究目的 ………………………………………………8 第二章 實驗設備 …………………………………………11 2-1 整體設備 ………………………………………………11 2-1-1 彎管試驗機本體  …………………………………14 2-1-2 電腦監控系統  ……………………………………16 2-1-3 油壓伺服控制設備 …………………………………18 2-1-4 檢測儀器  …………………………………………20 2-2 實驗機組裝功能  ……………………………………21 第三章 量測裝置  ………………………………………23 3-1 曲度檢測器使用原理  ………………………………24 3-2 管徑檢測器使用原理  ………………………………25 3-3 力檢測器  ……………………………………………26 第四章 實驗方法 …………………………………………27 4-1 實驗原理 ………………………………………………27 4-2 實驗材料 ………………………………………………28 4-3 實驗步驟 ………………………………………………29 4-4 實驗數據整理 …………………………………………32 4-5 實驗注意事項 …………………………………………34 第五章 結果與討論  ……………………………………35 5-1 循環彎曲的力學行為 …………………………………35 5-1-1 彎矩-曲度關係圖 …………………………………36 5-1-2 橢圓化-曲度關係圖 ………………………………38 5-2 循環彎曲的皺曲損壞 …………………………………40 第六章 結論  ……………………………………………42 6-1 總結 ……………………………………………………42 6-2 建議與心得 ……………………………………………44 參考文獻 ……………………………………………………80 自述

    1. S. Kyriakides and P. K. Shaw , “Response and Stability of Elastoplastic Circular Pipes Under Combined Bending and External Pressure,” International Journal of Solids and Structures, Vol. 18, pp. 957-973, 1982.

    2. P. K. Shaw and S. Kyriakides, “Inelastic Analysis of Thin-Walled Tubes Under Cyclic Bending,” International Journal of Solids and Structures, Vol. 21, pp. 1073-1100, 1985.

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

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

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

    6. D. L. McDowell, “Stress State Dependence of Cyclic Ratchetting Behavior of Two Rails Steels,” International Journal of plasticity, Vol. 11, No. 4, pp. 397-421, 1995.

    7. W. F. Pan and K. T. Leu, “Endochronic Analysis for Viscoplastic Collapse of a Thin-Walled Tube under Combined Bending and External Pressure, ” JSME International Journal, Series A, Vol. 40, No. 2, pp.189-199, 1997.

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

    9. W. F. Pan and Y. S. Her, “Viscoplastic Collapse of Thin-Walled Tubes under Cyclic Bending,” ASME Journal of Engineering Materials and Technology, Vol. 120, pp. 287-290, 1998.

    10. W. F. Pan and C. H. Fan, “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, 1998.

    11. 周鎮邦, “薄壁管在循環彎曲負載下平均曲度對皺曲行為之研究,” 國立成功大學工程科學系碩士論文, 2000.

    12. 佘健維, “單向對稱應力循環下之棘齒行為研究,” 國立台灣大學土木工程學系碩士論文, 2000.

    13. K. L. Lee, W. F. Pan and J. N. Kuo, “ The Influence of The Diameter-to-Thickness Ratio on The Stability of Circular Tubes Under Cyclic Bending,”International Journal of Solids and Structures, pp. 2401-2413, 2001.

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

    15. K. L. Lee, W. F. Pan and C. M. Hsu, “Collapse of Circular under Pure Bending Creep,” Journal of the Chinese Society of Mechanical Engineers, Vol. 22, No. 3, pp. 249-255, 2001.

    16. W. F. Pan and K. L. Lee, “The Effect of Mean Curvature on the Response and Collapse of Thin-Walled Tubes under Cyclic Bending,” JSME International Journal, series C, Vol. 45, No. 1, 2002.

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