Campus Units

Electrical and Computer Engineering, Center for Nondestructive Evaluation (CNDE)

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

10-16-2020

Journal or Book Title

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

Volume

378

Issue

2182

First Page

20190583

DOI

10.1098/rsta.2019.0583

Abstract

The eddy current non-destructive evaluation (NDE) modelling using Stratton-Chu formulation-based fast algorithm is analysed. Stratton-Chu formulations, which have no low frequency breakdown issue, are selected for modelling electromagnetic NDE problems with low frequency and high conductivity approximations. As the main contribution of this article, the robustness and efficiency of the approximations, which result in big savings in both memory and CPU time, are validated and analysed using examples from practical EC testing. The boundary element method (BEM) is used to discretize the integral equations into a linear system of equations: the first order Rao-Wilton-Glisson (RWG) vector basis functions with the flat triangle meshes of the object and pulse basis functions are selected to expand the equivalent surface currents and the normal component of magnetic fields, respectively. Then the multilevel adaptive cross approximation (MLACA) algorithm is applied to accelerate the iterative solution process. The performance and efficiency of adaptively applying a multi-stage (level) algorithm based on the criteria concluded for the operators are shown.

Comments

This is a manuscript of an article published as Bao, Yang, and Jiming Song. "Analysis of electromagnetic non-destructive evaluation modelling using Stratton-Chu formulation-based fast algorithm." Philosophical Transactions of the Royal Society A 378, no. 2182 (2020): 20190583. DOI: 10.1098/rsta.2019.0583. Posted with permission.

Copyright Owner

The Author(s)

Language

en

File Format

application/pdf

Published Version

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