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AluminumAluminum alloy plates play a crucial role in aerospace and transportation industries due to its high strengthStrength and excellent corrosionCorrosion resistance. However, the presence of defects such as cracksCrack and delaminations poses significant risks to safety and reliability. Electromagnetic acoustic transducers (EMATs), utilizing Lorentz force coupling, offer a promising nondestructive evaluation (NDE) technique characterized by non-contact operation and insensitivity to surface conditions. In this study, a finite element model was developed using COMSOL to simulate EMAT-based defect detection in aluminumAluminum plates. The multiphysics framework integrates magnetic, electrical, and structural fields to analyze magnetic flux, eddy currents, and Lorentz forces. Time-domain simulationsSimulation elucidate the propagation of surface and body waves, as well as their interactions with cracksCrack, encompassing direct transmission, boundary reflection, and defect reflection phenomena. Signal analysis at observation points reveals distinct characteristics of wave packets, facilitating precise defect localization. The findings affirm the efficacy of EMAT in detecting cracksCrack in aluminumAluminum plates and offer valuable insights into wave–defect interaction mechanisms. This research provides theoretical foundations for EMAT design and underscores its potential for reliable NDE of aluminumAluminum alloys in advanced engineering applications.

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Simulation Study on Electromagnetic Ultrasonic Signal Propagation for Defect Detection in Aluminum Plates

  • 会议论文

  • 发表日期：

    2026年

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  • Shuaishuai Xiao,
  • Fuyu Zhang,
  • Chun He,
  • Danbin Jia,
  • Songyuan Ai,
  • Dengfu Chen,
  • Huamei Duan,
  • Mujun Long

摘要

AluminumAluminum alloy plates play a crucial role in aerospace and transportation industries due to its high strengthStrength and excellent corrosionCorrosion resistance. However, the presence of defects such as cracksCrack and delaminations poses significant risks to safety and reliability. Electromagnetic acoustic transducers (EMATs), utilizing Lorentz force coupling, offer a promising nondestructive evaluation (NDE) technique characterized by non-contact operation and insensitivity to surface conditions. In this study, a finite element model was developed using COMSOL to simulate EMAT-based defect detection in aluminumAluminum plates. The multiphysics framework integrates magnetic, electrical, and structural fields to analyze magnetic flux, eddy currents, and Lorentz forces. Time-domain simulationsSimulation elucidate the propagation of surface and body waves, as well as their interactions with cracksCrack, encompassing direct transmission, boundary reflection, and defect reflection phenomena. Signal analysis at observation points reveals distinct characteristics of wave packets, facilitating precise defect localization. The findings affirm the efficacy of EMAT in detecting cracksCrack in aluminumAluminum plates and offer valuable insights into wave–defect interaction mechanisms. This research provides theoretical foundations for EMAT design and underscores its potential for reliable NDE of aluminumAluminum alloys in advanced engineering applications.