Study on Reverse Bending Characteristics in Straightening Process Considering the stress superposition

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Fang, Yuanming^1 ; Ling, He^1 ; Lu, Hong^1

School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan

430070, China^1

关键词: Deformation energy;    Discrete points;    Dynamic process;    Loading process;    Reverse bending;    Straightening process;    Stress and strain;    Stress superpositions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/2/022116/pdf
DOI  :  10.1088/1755-1315/252/2/022116

来源: IOP

【 摘 要 】

Straightening process is a typical dynamic process of multi-step reverse bending load. In adjacent straightening load, stress and strain will be superimposed with residual stress generated by straightening deformation energy influencing stress distribution state and reverse bending characteristics, particularly in the discrete points against bending straightening loading process. In order to describe the stress superposition state in process of straightening accurately, time operator is introduced to identify the discretization of straightening process and dynamic model characterized by curvature is created. Based on elastic-plastic mechanics and geometry hypothesis, the mathematical modeling of stress superposition state is established, and the relationship of discrete points reverse bending and straightening parameter in history is revealed.