Effect of Elastic Bending on Magnetic Properties of Oriented Silicon Iron

To determine how the ac and dc magnetic properties are affected by elastic strain, the magnetic properties in the rolling direction of Epstein strips of elastically bent grain-oriented 3% silicon iron were measured in an Epstein frame and in a Carr single-strip permeameter. As the degree of bending becomes more pronounced, the coercive force and the ac core loss increase and the permeability decreases. The domain theory gives a rather simple approximate interpretation of the permeability data for magnetic intensities between one and ten oersteds.