Finite Element Analysis on the Dent Deformation for Local Round-dented Circular Tubes under Cyclic Bending

• Main Authors: Yu-JuCheng, 鄭伃汝
• Other Authors: Wen-fung Pan
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/63462143371896266203

碩士 === 國立成功大學 === 工程科學系 === 104 === In this study, the finite element software ANSYS Workbench 15.0 is used to analyze the deformation of local round-dented 6061-T6 aluminum tubes under curvature-controlled cyclic bending. Different notch depths include 0.3, 0.6, 0.9 and 1.2 mm. The controlled curvature of the cyclic bending is  0.35 m-1. The deformations of the dent are analyzed at the first, fifth, tenth and fifteenth cycles. The deepest location of the dent at the positive maximum curvature subtracts the deepest location of the dent at the negative maximum curvature, thus, the total deformation of the dent deformation at that cycle can be obtained. When the finite element analysis result compares with the experimental image processing photographs shot by Han [17], the amounts of the dent depth are different along with the different curvature at the first cycle. But the dent deformation exhibits steady change at the fifth cycle. After a few bending cycles, the deformation of dent shows gradual decreasing phenomenon. Although some differences between the ANSYS analysis and experimental image processing photographs are found, but the trends of curves are similar.