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Integral equation method for evaluation of eddy-current impedance of a tilted, surface-breaking crack

机译:积分方程法用于评估倾斜的表面裂纹的涡流阻抗

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摘要

An integral equation method for solving the eddy-current nondestructive evaluation problem for a flat, tilted, and surface-breaking crack in a conducting half-space is presented. The method involves use of a half-space Green's tensor and the Bowler potential. This potential describes the jump in the electric field over the crack and is expanded in basis functions related to the Chebyshev polynomials, being a more analytical approach than the commonly used boundary element method. In the method, the scatterer defines a transformation operator to be applied on the incoming field. This is practical in simulations of the eddy-current inspection where this operator is independent of the position of the probe. The numerical calculations of the change in impedance due to the crack are compared to a Finite Element model of the problem and good agreement is found.
机译:提出了一种求解导电半空间中平坦,倾斜和表面破裂裂纹的涡流无损评估问题的积分方程方法。该方法涉及使用半空间Green的张量和Bowler势。该电势描述了电场在裂纹上的跃迁,并在与Chebyshev多项式有关的基函数中得到了扩展,这是一种比常用边界元方法更具分析性的方法。在该方法中,散射体定义了要应用于传入字段的变换运算符。这在模拟涡流检查中很实用,其中该操作符与探头的位置无关。将由裂纹引起的阻抗变化的数值计算与该问题的有限元模型进行了比较,并找到了很好的一致性。

著录项

  • 来源
    《Journal of Applied Physics》 |2013年第19期|1-6|共6页
  • 作者单位

    Department of Materials and Manufacturing Technology, Chalmers University of Technology, Göteborg, Sweden|c|;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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