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The longitudinal stress effect on magnetic properties of Si-Fe sheet materials is considered. Polish sheet materials (grain oriented ET-5 grade and non-oriented EP-20 grade) were tested. Core losses and permeability were determined using a single sheet tester with a device for exerting tensile and compressive stress. Considerable changes of specific core loss, permeability and the shape of hysteresis loop of specimens subjected to stress were observed.
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Dąbrowski et al. (1989) studied this question.
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