• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (4): 25-34.doi: 10.3901/JME.2020.04.025

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Magnetic Mixing Detection Method for Early Fatigue Damage of Ferromagnetic Materials

JIAO Jingpin1, CHANG Yu1, LI Guanghai2, WU Bin1, HE Cunfu1   

  1. 1. College of Mechanical Engineering and Application Electronics Technology, Beijing University of Technology, Beijing 100124;
    2. China Special Equipment Inspection and Research Institute, Beijing 100013
  • Received:2019-04-08 Revised:2019-10-23 Online:2020-02-20 Published:2020-04-23

Abstract: Among the common early mechanical property degradation damage of metal materials, fatigue has the greatest potential harm to the structure. Based on the hysteresis nonlinearity of ferromagnetic materials, the mechanism and manifestation of magnetic frequency mixing effect in ferromagnetic materials under high and low frequency excitation are analyzed. The relationship between the mixing component, the local hysteresis loops and the early damage of magnetic ferromagnetic materials is analyzed. The magnetic mixing nonlinear factor and the power law coefficient of local hysteresis loss are proposed to characterize the magnetic frequency mixing effect of ferromagnetic materials. Then, magnetic frequency mixing detection technology is used to detect fatigue damage of ferromagnetic materials. Experimental results show that the early fatigue damage of ferromagnetic materials can be characterized by two kinds of magnetic mixing characteristic parameters. This research work provides a feasible technical scheme for early fatigue damage detection of ferromagnetic materials.

Key words: ferromagnetic material, fatigue, magnetic mixing frequency, magnetic nonlinear, power law coefficient

CLC Number: