Investigation of the Magnetoelastic Villari Effect in Steel Truss

The following paper presents results of investigation of the magnetoelastic Villari effect in steel truss. Construction of the specially developed steel truss allowed to investigate three identical steel elements at the same time, where one element was subjected to the tensile stress and two elements were influenced by the compressive stress. For all three elements the magnetic characteristics for different values of applied mechanical stress were measured. Purpose of the performed investigation was experimental validation of the theory of magnetoelastic Villari effect for steel. For tensile stress initial increase of the magnetic flux density was observed up to the Villari reversal point and then values of magnetic flux density started to decrease. For compressive stress only decrease of the magnetic flux density was observed. Obtained experimental results confirmed theoretical description of the Villari magnetoelastic effect.