A Grain Structure Model based on Voronoi polygon of Non- oriented Electrical Steel in Blanking Process

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Wang, Zhe^1,2 ; Li, Shuhui^1,2 ; Dong, Liang^1,2 ; He, Ji^1,2

State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai

200240, China^1

Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures, Shanghai Jiao Tong University, Shanghai

200240, China^2

关键词: Blanking process;    Conventional modeling;    Material behaviour;    Motor laminations;    Non-oriented electrical steel;    Random microstructure;    Structure modeling;    Voronoi polygon;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032031/pdf
DOI  :  10.1088/1742-6596/734/3/032031

来源: IOP

【 摘 要 】

World-wide there is a trend to develop higher permeability grades, thin thickness and coarse grain of non-oriented electrical steels, a core function material of motors. Blanking is the most popular technique for producing the motor laminations. However, the deformation of material is significantly influenced by grain size. In this paper, Voronoi polygon is used for generate the random microstructures of the studied non-oriented electrical steel. Finite Element (FE) model considering grain size is thus established to analysis the blanking process. The material behaviour of grains is derived from the widely accepted surface layer model. Compared to the conventional model without considering the grain size, the novel model shows good matching with the experimental results.