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<p>This study utilizes the finite element method to simulate and analyze the variation in the penetration depth of critically refracted longitudinal waves under different sensor center frequencies and varying groove depths on the material surface. The stress distribution in a tensile specimen under dual loading conditions is investigated, along with the time of flight of sound waves in different loading states, and the variation in sound velocity in different propagation directions. During the measurement of residual stress in welded workpieces, it is found that the angle <i>ζ</i> between the detection normal direction and the weld seam direction significantly affects the measured stress values. To minimize measurement errors, selecting the optimal detection normal direction becomes paramount. Through a comparison of stress values measured at different angles with those obtained using the blind hole method, it is determined that when <i>ζ</i> is 30°, the experimental stress values closely matched the true values, thereby significantly improving the accuracy of the measurements.</p>

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Measurement of Residual Stress of Metal Materials Based on Ultrasonic Detection Method

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Ting Ma,
  • Guocheng Xu,
  • Juan Dong,
  • Xiaopeng Gu,
  • Guanghao Zhou,
  • Mingfu Shao

摘要

This study utilizes the finite element method to simulate and analyze the variation in the penetration depth of critically refracted longitudinal waves under different sensor center frequencies and varying groove depths on the material surface. The stress distribution in a tensile specimen under dual loading conditions is investigated, along with the time of flight of sound waves in different loading states, and the variation in sound velocity in different propagation directions. During the measurement of residual stress in welded workpieces, it is found that the angle ζ between the detection normal direction and the weld seam direction significantly affects the measured stress values. To minimize measurement errors, selecting the optimal detection normal direction becomes paramount. Through a comparison of stress values measured at different angles with those obtained using the blind hole method, it is determined that when ζ is 30°, the experimental stress values closely matched the true values, thereby significantly improving the accuracy of the measurements.