Modeling of magnetic and magnetoelastic behavior of prestressing steel near saturation

For the design of a magnetoelastic device for force measurements in tendons of prestressed concrete structures, magnetic and magnetoelastic measurement data of the BH-normal induction curve were determined for three prestressing steel specimens using a NPL-permeameter. These data were compared to three saturation models known from the literature: the linear (LSL), the quadratic (QSL) and the square-root (RSL) saturation law. The LSL, which was found to be the most suitable of them, is magnetoelastically generalized to the extended linear saturation law (ELSL). The magnetoelastic magnetization data of three selected prestressing steel specimens agree well with the ELSL-model equation. Model parameters, mechanical data and chemical composition of the three specimens are given.<
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