ABSTRACT Eddy Current Testing (ECT) plays a key role in detecting cracks and defects in conductors. The present study examines for the first time how the subregion method as an effective mathematical and computational technique can be admixed with Finite Element Method (FEM) to study multiple defects parameters for ECT issues. Separating a defect region from the entire domain in any computational technique will save both time and storage space. Examples of different types of defects are presented in this article . A tangible result of processing time reduction by 90% has been achieved which has led us to consider the subregion FEM method as an effective method in solving different Nondestructive Evaluation (NDE) problems. An agreement between our results and others using classical FEM has been achieved which could lead to using this technique in online and field testing problems. The presented subregion FEM algorithm was verified experimentally with good agreement by testing Aluminum (T6061-T6) samples with defects. A Tunneling Magnetoresistive (TMR) sensor was used to measure the component of the magnetic field from normal to the sample top surface. A major component of minimizing processing time was achieved, which could lead to using this technique in online and field testing problems.

中文翻译：

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使用子区域有限元方法的涡流检测问题的计算研究和光滑形状缺陷合成

摘要 涡流检测 (ECT) 在检测导体中的裂纹和缺陷方面起着关键作用。本研究首次检验了子区域方法作为一种有效的数学和计算技术如何与有限元方法 (FEM) 混合以研究 ECT 问题的多个缺陷参数。在任何计算技术中将缺陷区域与整个域分离将节省时间和存储空间。本文提供了不同类型缺陷的示例。已经取得了处理时间减少 90% 的实际结果，这使我们将子区域 FEM 方法视为解决不同无损评估 (NDE) 问题的有效方法。我们的结果与其他使用经典 FEM 的结果达成了一致，这可能导致在在线和现场测试问题中使用该技术。通过测试具有缺陷的铝 (T6061-T6) 样品，通过实验验证了所提出的子区域 FEM 算法具有良好的一致性。隧道磁阻 (TMR) 传感器用于测量从法线到样品顶面的磁场分量。实现了最小化处理时间的主要组成部分，这可能导致在在线和现场测试问题中使用该技术。隧道磁阻 (TMR) 传感器用于测量从法线到样品顶面的磁场分量。实现了最小化处理时间的主要组成部分，这可能导致在在线和现场测试问题中使用该技术。隧道磁阻 (TMR) 传感器用于测量从法线到样品顶面的磁场分量。实现了最小化处理时间的主要组成部分，这可能导致在在线和现场测试问题中使用该技术。