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

Volume

2

fYear

2001

fDate

37104

Firstpage

1085

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICEMS.2001.971866

Filename

971866