Effect of Stress on Vector Magnetic Property and Two-dimensional Magnetostriction of a Non-oriented Electrical Steel Sheet

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This paper presents effect of stress on vector magnetic properties and two-dimensional magnetostriction of a non-oriented electrical steel sheet. In order to evaluate two-dimensional magnetostriction under stress in the electrical steel sheet, a new six-axial stain gauge is developed. Results reveal that the amplitude and direction of the magnetic field strength vector and magnetostriction differ strongly due to the tensile and compressive stresses. In particular, it was clear that the direction of the magnetic field strength vector and magnetostriction was not parallel to the applied stress direction. In addition, the peak-to-peak value of the magnetostriction and magnetic power loss increased when the stress is applied. Therefore, evaluation of the amplitude and direction in a two-dimensional magnetostriction is necessary in order to know the relationships between the magnetic properties and stress.
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