Bridge the gap of theoretical and experimental eddy current NDT

哈德斯菲尔德在涡流无损检测和评估方面有着出色的研究记录，特别是脉冲涡流和使用实验方法的信号处理。Theodoulidis博士在分析涡流模型方面拥有非常好的研究记录并发表了著名的著作。目前，涡流无损检测（ECT）的理论和实验之间存在差距。例如，ECT的分析模型集中于线圈阻抗变化与缺陷的计算;相反，大多数ECT的实验研究磁场分布与缺陷。许多反演模型都是通过实验或数值模型来研究的，这是非常昂贵的。拟议的访问奖学金是为了使Theodoulidis博士（西马其顿大学）能够在哈德斯菲尔德田教授领导的系统工程研究小组工作。我们建议将截断区域本征函数展开（TREE）技术整合到我们现有的脉冲涡流，微磁传感器阵列，应力映射和搅拌摩擦焊接和复杂多层结构疲劳裂纹检测的应用程序的电磁数值模拟实验研究中。

Huddersfield has an excellent research record on eddy current NDT&E, particularly pulsed eddy current and signal processing using experimental methods. Dr Theodoulidis has very good research records on analytical eddy current models and notable publication. Currently, there are gaps between theoretical and experimental eddy current NDT (ECT). For examples, analytical models of ECT concentrate on computation on coil impedance variation vs defects; in contrast, most experimental study of ECT investigates the magnetic field distribution vs defects. Many inverse models are investigated by experiments or numerical models, which is very costly. The proposed Visiting Fellowship is to enable Dr Theodoulidis (University of West Macedonia) to work in the Systems Engineering Research Group led by Professor Tian at Huddersfield. We propose to integrate the Truncated Region Eigenfunction Expansion (TREE) techniques into a wide range of our existing numerical electromagnetic simulation experimental studies on pulsed eddy current, micro magnetic sensor array, stress mapping and applications on stirring friction welds and detection of fatigue cracks in complex, multilayered structure.