SS400 鋼の磁化特性を利用した応力と塑性変形の評価
Estimation of Stress and Plastic Deformation of SS400 SteelUsing Magnetic Properties
著者:
渡邊 誠 Makoto WATANABE 安部 正高 Masataka ABE 松本 英治 Eiji MATSUMOTO
発刊日:
公開日:
magnetization curvemagnetoelastic couplingnondestructive inspectionplastic deformationstress
概要
Ferromagnetic materials have the interaction between mechanical and magnetic fields which is called magnetoelastic coupling. Also it is known that magnetic properties of ferromagnetic materials depend on plastic deformation. There are various kinds of Non-Destructive Testing (NDT) based on these phenomena for estimation of stress and plastic deformation. We propose a new analytical method of magnetic hysteresis curve, in which the saturation magnetic hyste resis curve is decomposed to neutral magnetization curve and hysteresis gap curve. Each of the curves is expanded into power series, and its coefficients are extracted as parameters for the estimation. To verify this method, satur ation magnetic hysteresis curves of SS400 steel, a typical structural material, are measured under tensile stress and after plastic deformation. The method is found to be effective to estimate the existence of plastic deformation.
