Crack identification in metallic materials

Author

Saotome, Hideo ; Doi, Tatsuya ; Hayano, S. ; Saito, Yoshifuru

Author_Institution

Coll. of Eng., Hosei Univ., Tokyo, Japan

Volume

29

Issue

2

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

1861

Lastpage

1864

Abstract

A novel formulation for the crack identification problem is proposed. In this formulation, cracks are regarded as the equivalent field or potential sources due to the discontinuity of conductivity at the crack positions. This means that crack identification problems are reduced to the inverse problems of searching for equivalent sources. The system equation of the inverse problems, derived by discretizing the integral equation, is successfully solved by the sampled pattern matching method. As a consequence, fairly good results are obtained even in the case of plural defect problems

Keywords

crack detection; electric potential; integral equations; inverse problems; magnetic fields; metals; conductivity discontinuity; crack identification; electric potential sensing method; equivalent field; integral equation; inverse problems; magnetic field sensing method; metallic materials; plural defect problems; potential sources; sampled pattern matching; system equation; Conducting materials; Conductivity; Current density; Inorganic materials; Integral equations; Inverse problems; Magnetic fields; Magnetic materials; Pattern matching; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.250769

Filename

250769