Mechanical analysis of flexible bending of tubes

4th International Conference on Energy Equipment Science and Engineering

Shi, C.F.^1^2 ; Fu, W.Z.^1^2 ; Li, M.Z.^1^2

College of Materials Science and Engineering, Jilin University, Nanling Campus, 5988 Renmin Street, Changchun

130022, China^1

Roll Forging Research Institute, Jilin University, Nanling Campus, 5988 Renmin Street, Changchun

130022, China^2

关键词: Bending curvature;    Bending process;    Bending radius;    Finite element numerical simulation;    Mechanical analysis;    Stress state;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/242/3/032055/pdf
DOI  :  10.1088/1755-1315/242/3/032055

来源: IOP

【 摘 要 】

Flexible bending successfully solves the problem of multi-curvature and small batch of bending tubes. In the flexible bending process of tubes, the stress state and deformation of bent tubes are complex. In order to better understand and analyze the bending deformation of tubes, the bending process of tubes was analyzed mechanically and the formula of bending moment was deduced. The residual stress in the forming process of tubes was analyzed by finite element numerical simulation. The results show that the bending moment is closely related to the tube specifications, material properties and bending curvature. In the process of flexible bending, the distribution of circumferential residual stress has some regularity; the thrust of pusher has stability and increases with the decrease of bending radius.