Laser ultrasonic damage detection in coating-substrate structure via Pearson correlation coefficient

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2018
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Chang, Ying
Yang, Dexing
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This study explores the feasibility of using laser generated ultrasonic wave to detect the interfacial damage of coating-substrate structure. Two Pearson correlation coefficient based post processing algorithms are respectively modified and used in order to evaluate the damage-induced waveform variation and thus position the damage accurately. In addition, the ultrasonic signals of frequency-domain and time-domain are separately studied to optimize the damage visualization performance of the two approaches. The proposed method helps to facilitate nondestructive examination of laser ultrasonic technique.

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530 Physik
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Damage detection, Coating-substrate structure, Pearson correlation coefficient, Laser ultrasonics
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ISO 690CHANG, Ying, Dexing YANG, Yuning GUO, 2018. Laser ultrasonic damage detection in coating-substrate structure via Pearson correlation coefficient. In: Surface and Coatings Technology. 2018, 353, pp. 339-345. ISSN 0257-8972. eISSN 1879-3347. Available under: doi: 10.1016/j.surfcoat.2018.09.005
BibTex
@article{Chang2018-11Laser-44338,
  year={2018},
  doi={10.1016/j.surfcoat.2018.09.005},
  title={Laser ultrasonic damage detection in coating-substrate structure via Pearson correlation coefficient},
  volume={353},
  issn={0257-8972},
  journal={Surface and Coatings Technology},
  pages={339--345},
  author={Chang, Ying and Yang, Dexing and Guo, Yuning}
}
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