Location

La Jolla, CA

Start Date

1980 12:00 AM

Description

Solution of the inversion problem in quantitative eddy current NDE requires an adequate mathematical model to describe the complicated interactions of currents, fields and flaws in materials. Existing analytical techniques are not capable of accommodating materials with nonlinear magnetic characteristics or awkward flaw shapes. This paper describes a finite element computation of the complex impedance of an eddy current sensor in axisymmetric testing configurations, some with defects and gives the corresponding magnetic flux distributions. The authors suggest that, because finite element analysis techniques are not limited by material nonlinearities and complex defect geometries, they can be applied to the development of computer based defect characterization schemes for realistic eddy current NDE applications.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

3. Eddy Currents

Pages

25-32

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Finite Element Analysis of Aximsymmetric Geometries in Quantitative NDE

La Jolla, CA

Solution of the inversion problem in quantitative eddy current NDE requires an adequate mathematical model to describe the complicated interactions of currents, fields and flaws in materials. Existing analytical techniques are not capable of accommodating materials with nonlinear magnetic characteristics or awkward flaw shapes. This paper describes a finite element computation of the complex impedance of an eddy current sensor in axisymmetric testing configurations, some with defects and gives the corresponding magnetic flux distributions. The authors suggest that, because finite element analysis techniques are not limited by material nonlinearities and complex defect geometries, they can be applied to the development of computer based defect characterization schemes for realistic eddy current NDE applications.