本研究是以有限元素分析軟體ANSYS Workbench 12.0分析6061-T6鋁合金管具有環狀尖銳凹槽時，受到對稱曲度循環彎曲負載下之力學行為。其中尖銳凹槽的深度有0.4、0.8、1.2、1.6和2.0 mm，循環彎曲的曲度控制在+0.1至-0.1 m-1之間。根據林柏諺【28】所作的實驗結果顯示，不同深度尖銳凹槽6061-T6鋁合金管，承受對稱曲度循環彎曲負載時，彎矩-曲度關係呈現隨著循環次數的增加漸趨於穩定的現象，凹槽深度與彎矩呈現反比的關係。而橢圓化-曲度關係則呈現棘齒狀，並隨著循環圈數成長的趨勢，且在較淺凹槽深度下，呈現左右對稱的關係，而在較深的凹槽深度時，則曲線呈現不對稱的情形。此外，隨著凹槽深度的增加，橢圓化成長的速度將會越快。最後，本研究的ANSYS分析也與實驗結果進行比較，結果顯示模擬數值雖與實驗值有些許差異，但兩者的趨勢卻非常相似。

In this study, the finite element software ANSYS Workbench 12.0 is used to analyze the mechanical behavior of sharp-notched 6061-T6 aluminum tubes under curvature-controlled symmetrical cyclic bending. Different notch depths have 0.4, 0.8, 1.2, 1.6 and 2.0 mm. The controlled curvature of the cyclic bending is between +0.1 to -0.1 m-1. According to the experimental data from Lin Bo-Yan【28】, the moment-curvature relationship exhibits increasing manner with the number of cycles and gradually becomes steady. The notch depth is inversely proportional to the moment. For the relationship of the ovalization and curvature, it exhibits the ratcheting, and increasing phenomenon with the number of cycles. The relationship shows symmetrical at shallow notch, however, the relationship shows unsymmetrical at deeper notch. In addition, as the notch depth increases, the growth speed of ovalization will be faster. Finally, the ANSYS analysis is compared with the experimental data. Although some differences between the experimental and simulated results, but the trends are very similar between the two.

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