A practical approach for electromagnetic analysis with the effect of the residual strain due to manufacturing processes

Toward reliable and advanced machine designs, a practical modeling method of degraded steel sheets due to manufacturing processes is proposed. The advantage of the proposed method is the fact that the required material data can be measured with the standard single sheet testing without special measurement equipment so that machine manufactures will be able to take into account of the degradation effects according to their manufacturing processes. In the proposed approach, an approximation function which represents spatial variation of the degradation for each BH and loss property is identified using measurement data of steel sheet strips which have different widths. The identified approximation functions provide the material properties for Finite Element Analysis. It is shown that FEA calculations using the proposed method reproduce well the measurement results of cut steel sheets.