Title :
3-D nonlinear analysis of effect of air gap between yoke and steel in alternating flux leakage testing
Author :
Gotoh, Yuji ; Takahashi, Norio
Author_Institution :
Chugoku Polytech. Coll., Kurashiki, Japan
Abstract :
The alternating magnetic flux leakage testing has been applied in the inspection process for detecting cracks on the surface of steel. This testing detects the leakage flux from the cracks in ferromagnetic material magnetized by the AC electromagnet. The signal is affected by the construction of the equipment. In this paper, the effect of the air gap between the yoke and the steel plate on the leakage flux and the phase angle between the flux of a search coil and the exciting current are investigated using 3-D alternating nonlinear edge-based hexahedral finite element method
Keywords :
air gaps; crack detection; crazing; electromagnets; ferromagnetic materials; finite element analysis; inspection; magnetic flux; magnetic leakage; magnetisation; steel; 3-D nonlinear analysis; AC electromagnet; air gap; alternating flux leakage testing; exciting current; ferromagnetic material; hexahedral finite element method; inspection process; magnetisation; phase angle; search coil; steel surface; surface cracks detection; yoke; Coils; Electromagnets; Inspection; Leak detection; Magnetic analysis; Magnetic flux leakage; Magnetic materials; Materials testing; Steel; Surface cracks;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.971866
