Magnetic forces and stresses in ferromagnetic material

In this paper, the effect of the stresses in ferromagnetic materials is described based on the Chu model formulation. Such formulation is applied for the identification of the magnetoelastic behaviour of the magnetic materials. It is shown that a compressive stress is present in the ferromagnetic material, even if the stress tensor τ̅_c is zero, which, as a result, tries to shorten the magnetic flux path length and shrink the magnetic core. The effect is further illustrated on a single-phase transformer core.