臺灣博碩士論文加值系統

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

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