查詢結果分析
來源資料
相關文獻
- 凹痕圓管在循環彎曲負載下行為與損壞之研究
- 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
- 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
- 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
- 尖銳凹槽316L不鏽鋼管在純彎曲潛變及鬆弛負載下行為之實驗與理論研究
頁籤選單縮合
題名 | 凹痕圓管在循環彎曲負載下行為與損壞之研究=Response and Failure of Dented Circular Tubes Subjected to Cyclic Bending |
---|---|
作 者 | 李國龍; 吳政昌; 潘文峰; | 書刊名 | 中正嶺學報 |
卷期 | 45:2(A) 2016.11[民105.11] |
頁次 | 頁87-95 |
分類號 | 440.21 |
關鍵詞 | 凹痕圓管; 不同凹痕深度; 循環彎曲; 彎矩; 曲度; 橢圓化; 循環至損壞圈數; Dented circular tubes; Different dent depths; Cyclic bending; Moment; Curvature; Ovalization; Number of cycles required to failure; |
語文 | 中文(Chinese) |
中文摘要 | 本文主要是研究不同深度凹痕圓管在循環彎曲負載下的行為及損壞,而所使用的圓管材料 為6061-T6 鋁合金管,凹痕深度包含有: 0.0、0.3、0.6、0.9 及1.2 mm。從實驗的彎矩-曲度曲線 中顯示,在對稱循環彎曲時,沒有凹痕的圓管呈現對稱且穩定的迴圈,而有凹痕的圓管則因不 同深度凹痕兩側接觸的關係,呈現不同程度不對稱但穩定的迴圈。其次,由實驗的橢圓化-曲度 曲線中發現,在對稱循環彎曲時,沒有凹痕的圓管呈現對稱且棘齒狀增加的變化,而有凹痕的 圓管因凹痕兩側接觸的程度不同呈現不對稱且棘齒狀增加的變化。而且凹痕深度越深,橢圓化- 曲度曲線就越不對稱。當橢圓化值增加到某一臨界值時,圓管便會發生皺曲或破裂。此外,由 實驗的雙對數座標控制曲度-循環至損壞圈數曲線中發現,五種凹痕深度可對應出五條不平行的 直線。最後,本文提出理論模式來描述控制曲度-循環至損壞圈數的關係。在與實驗結果比較後 發現,理論能夠合理描述實驗結果。 |
英文摘要 | In this paper, the response and failure of dented circular tubes with different dent depths under cyclic bending were investigated. The material used was 6061-T6 aluminum alloy and the dent depths considered included: 0.0, 0.3, 0.6, 0.9 and 1.2 mm. From the experimental moment-curvature relationship, the curve becomes symmetrical and steady loop for tubes without a dent. Due to the contact of the two sides for different dent depths, the curves show different degrees of unsymmetry but steady loops for dented tubes. Next, from the experimental ovalization-curvature curve, the ovalization of the tube cross-section increases in a symmetrical and ratcheting manner for tubes without a dent. However, due to the contact of the two sides for different dent depths, the ovalizations show different degrees of unsymmetrical, ratcheting and increasing manner for dented tubes. A higher dent depth leads to a more unsymmetrical ovalization-curvature curve. The tube buckles or fractures when the ovalization of the tube cross-section reaches a critical amount. In addition, it is shown from the experimental controlled curvature-number of cycles required to failure relationship in a log-log scale that five nonparallel straight lines correspond to five different dent depths. Finally, a theoretical formulation was proposed in this paper to simulate the relationship between the controlled curvature and the number of cycles required to failure. By comparing the theoretical analysis with the experimental data, it is shown that the theoretical formulation can properly simulate the experimental results. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。