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Chinese Journal of Lasers, Volume. 51, Issue 8, 0804006(2024)

Elastic Property Inversion of Materials via Lamb Waves Generated by a Moving Continuous‑Wave Laser

Qiuyu Li1, Zheng Li2, Jian Lu1, Weiwei Kan1、**, and Zhonghua Shen1、*
Author Affiliations
  • 1School of Science, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu , China
  • 2COMAC Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 201324, China
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    AbstractGet PDF(in Chinese)
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    Variation of dispersion curves caused by longitudinal wave velocity (cL) and shear wave velocity (cT). (a) Variation of dispersion curves caused by 1.05cL (solid line) and 0.95cL (dashed line); (b) variation of dispersion curves caused by 1.05cT (solid line) and 0.95cT (solid line)

    Fig. 1. Variation of dispersion curves caused by longitudinal wave velocity (cL) and shear wave velocity (cT). (a) Variation of dispersion curves caused by 1.05cL (solid line) and 0.95cL (dashed line); (b) variation of dispersion curves caused by 1.05cT (solid line) and 0.95cT (solid line)

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    RMSE maps under different conditions. (a) No noise; (b) 0.5% noise; (c) 0.05% noise; (d) 1% noise

    Fig. 2. RMSE maps under different conditions. (a) No noise; (b) 0.5% noise; (c) 0.05% noise; (d) 1% noise

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    Experimental setup

    Fig. 3. Experimental setup

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    Experimental device. (a) Optical path of moving laser source; (b) aluminum plate; (c) PVDF detector

    Fig. 4. Experimental device. (a) Optical path of moving laser source; (b) aluminum plate; (c) PVDF detector

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    Dispersion curve (isometric map) and the final forward calculation result (dashed line), where dot marks represent fitting data. (a) 0.5 mm thick aluminum plate; (b) 1.0 mm thick aluminum plate; (c) 1.6 mm thick aluminum plate; (d) 2.3 mm thick polystyrene plate

    Fig. 5. Dispersion curve (isometric map) and the final forward calculation result (dashed line), where dot marks represent fitting data. (a) 0.5 mm thick aluminum plate; (b) 1.0 mm thick aluminum plate; (c) 1.6 mm thick aluminum plate; (d) 2.3 mm thick polystyrene plate

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    • Table 1. Inversion results of longitudinal and shear wave velocities of aluminum and polystyrene plates

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      Table 1. Inversion results of longitudinal and shear wave velocities of aluminum and polystyrene plates

      MaterialLongitudinal wave velocity /（m·s-1）Shear wave velocity /（m·s-1）
      0.5 mm thick aluminum plate6402±31.53170±15.5
      1.0 mm thick aluminum plate6322±32.23151±16.0
      1.6 mm thick aluminum plate6261±28.83131±14.4
      2.3 mm thick polystyrene plate2299±11.41106±5.5
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    Qiuyu Li, Zheng Li, Jian Lu, Weiwei Kan, Zhonghua Shen. Elastic Property Inversion of Materials via Lamb Waves Generated by a Moving Continuous‑Wave Laser[J]. Chinese Journal of Lasers, 2024, 51(8): 0804006

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    Paper Information

    Category: Measurement and metrology

    Received: Aug. 4, 2023

    Accepted: Oct. 9, 2023

    Published Online: Apr. 17, 2024

    The Author Email: Kan Weiwei (kan@njust.edu.cn), Shen Zhonghua (shenzh@njust.edu.cn)

    DOI:10.3788/CJL231089

    CSTR:32183.14.CJL231089

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology