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Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part II
Article type: Research Article
Authors: Zhang, Weimina | Yuan, Junjieb | Mao, Xinyanc | Fan, Zhanga
Affiliations: [a] School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing, China | [b] School of Mechanical and Electronical Engineering, North China University of Technology, Beijing, China | [c] School of Information Science and Technology, Beijing Institute of Technology, Beijing, China
Abstract: Semisinusoidal loads with constant amplitude or increasing amplitude were applied on steel specimens separately in earth magnetic field. The testing results indicated that the variation degree of the magnetic signals was mostly determined by the amplitude of the applied loads. With the load amplitude increasing to plastic loading stage, zero-crossing of the H_{p}(y) distribution curve occurred and stayed at certain position where the curve has large gradient. The zero-crossing position was exactly the necking point and unchangeable after unloading, which suggested that the plastic failures and microdefects can be identified through testing the H_{p}(y) signals.
Keywords: Cyclic stress, metal magnetic memory effect, magnetic testing, plastic deformation
DOI: 10.3233/JAE-2010-1239
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1201-1209, 2010
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