Advanced Multi-Media Element for Simulating Distribution of Magnetic Flux Density Influenced by Narrow Crack

被引：8

作者：

Jomdecha, Cherdpong ^{[1
]}

Li, Xudong ^{[1
]}

Cai, Wenlu ^{[1
]}

Xie, Shejuan ^{[1
]}

Chen, Zhenmao ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Shaanxi Engn Res Ctr NDT & Struct Integr Evaluat, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Shaanxi, Peoples R China

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2019年 / 55卷 / 06期

基金：

美国国家科学基金会;

关键词：

Coefficient matrix; eddy current testing (ECT); multi-media element (MME); narrow crack; CONTINUUM DAMAGE MODEL; SIGNAL;

D O I：

10.1109/TMAG.2019.2897850

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In order to calculate eddy current testing (ECT) signals due to a complex natural crack by using a regular mesh, the multimedia element (MME) was proposed by authors. In this paper, a new high-precision method for calculating the MME coefficient matrices is proposed and implemented in the finite-element method (FEM)-BEM hybrid code for ECT of narrow cracks. Through the comparison of the new MME solutions with those of the conventional FEM-BEM method, validity and efficiency of the new method and the corresponding numerical code are demonstrated. Eddy current perturbations and distributions of the magnetic flux density affected by a narrow crack of different directions are also numerically analyzed by using the new MME. In addition, the measurement results from the experiments give further support to the validity of the new MME method.

引用

页数：4

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