查詢結果分析
來源資料
相關文獻
- 不同尖銳凹槽深度304不銹鋼管在循環彎曲負載下黏塑性行為之實驗分析
- 圓管在對稱及不對稱循環彎曲負載下力學行為之實驗研究
- 316L不銹鋼管在循環彎曲負載下行為之實驗分析
- 局部尖銳凹槽SUS304不鏽鋼管在循環彎曲負載下之力學行為與皺曲損壞
- The Response of 6061-T6 Aluminum Alloy Tubes with Different Chop Depths under Cyclic Bending
- 凹痕圓管在循環彎曲負載下行為與損壞之研究
- 橢圓形凹槽圓管在循環彎曲負載下力學行為之ANSYS有限元素分析
- 不同內外直徑SUS 304不銹鋼管在循環彎曲負載下力學行為及挫曲損壞之實驗分析
- Theoretical Simulations of the Response for Circular Tubes under Cyclic Bending
- 循環彎曲負載下橢圓形凹槽圓管皺曲損壞之實驗分析
頁籤選單縮合
題 名 | 不同尖銳凹槽深度304不銹鋼管在循環彎曲負載下黏塑性行為之實驗分析=Experimental Analysis on the Viscoplastic Behavior of Sharp-Notched 304 Stainless Steel Tubes with Different Notch Depths under Cyclic Bending |
---|---|
作 者 | 洪兆宇; 李國龍; 潘文峰; | 書刊名 | 技術學刊 |
卷 期 | 26:4 2011.12[民100.12] |
頁 次 | 頁235-242 |
分類號 | 440.365 |
關鍵詞 | 尖銳凹槽304不銹鋼管; 循環彎曲; 黏塑性行為; 彎矩; 曲度; 橢圓化; 循環彎曲至皺曲圈數; Sharp-notched 304 stainless steel tubes; Cyclic bending; Viscoplasic behavior; Bending moment; Curvature; Ovalization; Number of cycles to produce buckling; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要係實驗分析五種不同尖銳凹槽深度 (0.2、0.4、0.6、0.8及 1.0 mm) 的 304不銹鋼管在三種不同加載曲度率 (0.0035、0.035及 0.35 m−1s−1) 循環彎曲負載下的力學行為與皺曲損壞 (黏塑性行為 )。實驗係透過彎管試驗機與曲度-橢圓化量測器來進行實驗數據的控制、量測及蒐集。實驗結果顯示,不論任何凹槽深度, 304不銹鋼管的彎矩-曲度關係會呈現循環硬化的現象,且最後彎矩-曲度曲線會形成一穩定的迴圈。而橢圓化-曲度關係則呈現不對稱棘齒狀的變化,且凹槽深度越深,曲線的不對稱現象會越明顯。由雙對數座標中曲度-循環彎曲至皺曲圈數的實驗關係中發現,在個別的加載曲度率循環彎曲負載下,五個不同尖銳凹槽深度的試件可近似為五條幾乎平行的直線。最後,本文參考 Shaw和 Kyriakides 及 Pan和 Her 論文中的理論方程式後,提出一個可以描述不同尖銳凹槽深度的 304不銹鋼管在不同加載曲度率循環彎曲負載時,控制曲度與循環彎曲至皺曲圈數關係的理論方程式。在與實驗值做比較後發現,理論分析能合理的描述實驗結果。 |
英文摘要 | This paper presents an experimental investigation of the mechanical behavior and buckling failure (viscoplastic behavior) of 304 stainless steel tubes with five different sharp-notched depths (0.2, 0.4, 0.6, 0.8 and 1.0 mm) subjected to cyclic bending with three different curvature-rates (0.0035, 0.035 and 0.35 m−1−1). A tube bending machine and curvature-ovalization measurement aspparatus were used to control, measure and collect experimental data. It can be observed from the experiment data that the 304 stainless steel tube with any notch depth exhibits a cyclic hardening phenomenon from the moment and curvature relationship, and a steady-state loop of the moment-curvature curve is found after a few loading cycles. It can also be observed that the relationship between the ovalization and curvature demonstrates a nonsymmetric, ratcheting phenomenon. Higher notch depth leads to further nonsymmetry of the curve. It can be observed from the experimental curvature-number of cycles to produce buckling curves that five almost parallel straight lines can be found for five different sharp-notched depths at each curvature-rate in a log-log scale. Finally, by referring to the theoretical formulations proposed by Shaw and Kyriakides, and Pan and Her, a theoretical formulation was proposed to simulate the relationship between the controlled curvature and the number of cycles to produce buckling for 304 stainless steel tubes with different sharp-notched depths at different curvature-rates. By comparing theoretical analysis with experimental data, it is shown that the theoretical formulation can properly represent the experimental results. |
本系統中英文摘要資訊取自各篇刊載內容。