A Numerical Method for Simulation of Nonlinear Eddy Current Testing Signals Based on Transient <i>A</i><sub>r</sub> Formulation

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  • Xie Shejuan
    State Key Lab for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University Institute of Fluid Science, Tohoku University
  • Li Yunfei
    State Key Lab for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University
  • Cai Wenlu
    State Key Lab for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University
  • Chen Hong-En
    State Key Lab for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University
  • Chen Zhenmao
    State Key Lab for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University
  • Takagi Toshiyuki
    Institute of Fluid Science, Tohoku University
  • Uchimoto Tetsuya
    Institute of Fluid Science, Tohoku University
  • Yoshida Yasuhiko
    The Kansai Electric Power Company

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  • A Numerical Method for Simulation of Nonlinear Eddy Current Testing Signals Based on Transient Ar Formulation

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Abstract

To explore the principle and to optimize the nonlinear Eddy Current Testing (ECT) system, a forward numerical analysis code for nonlinear ECT signal simulation is indispensable. In this paper, an edge element numerical code of the transient Ar (reduced A) formulation is developed for this purpose. The nonlinear feature of the permeability in each element is taken into account at every time step during step by step numerical integration procedure. The dependence of the third harmonic component of the response signals on the initial permeability is investigated by using the developed code. The qualitative agreement of the simulation and the experimental results demonstrated the feasibility of the proposed simulation method and the corresponding numerical code.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 54 (6), 964-968, 2013

    The Japan Institute of Metals and Materials

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