Article Article
Total Focusing Method with Laser-Generated Ultrasonic Waves for Defect Detection in Finite Plates

Total Focusing Method (TFM) was employed using laser-generated ultrasonic plate waves. The goal was to assess the feasibility of using this technique for applications where testing constraints necessitate couplant-free, remote, guided-wave conditions. The application under consideration is using laser-generated TFM to assess ultrasonically welded battery tab-to-electrode foil stack joints. It was determined that laser-generated guided wave TFM can be used to remotely assess defects in a finite plate when the defects are strong reflectors in the plane of propagation. The finite dimensions of the tab necessitate a strong understanding of the edge reflection effects on the TFM image. The guided wave modes used in this study were strongly affected by scattering due to a complicated weld surface. Future work will investigate methods to compensate for the strong scattering, the use of other guided wave geometries, out of plane TFM reconstruction for other weld defect types, as well as apodization effects.

DOI: 10.32548/RS.2022.024


[1] C. Holmes, B. W. Drinkwater, P. D. Wilcox, (2005), “Post-processing of the full matrix of ultrasonic transmit-receive array data for non-destructive evaluation,” NDT&E International, vol 38, pp. 701-711

[2] C. B. Scruby and L. E. Drain, Laser ultrasonics: techniques and applications., New York: Taylor & Francis Group, 1990.

[3] W. Gao, C. Glorieux and J. Thoen, (2003), "Laser ultrasonic study of Lamb waves: determination," International journal of engineering science, vol. 41 (2), pp. 219-228

[4] S. W. Kercel, R. A. Kisner, M. B. Klein, G. D. Bacher and B. F. Pouet, (1999) "In-process detection of weld defects using laser-based ultrasound," International Society for Optics and Photonics, vol. 3852, pp. 81-92

[5] M. D. Beard, M. J. S. Lowe and P. Cawley, (2003) "Ultrasonic guided waves for the inspection of grouted tendons and bolts," Journal of Materials in Civil Engineering, vol. 15 (3), pp. 212-218

[6] J. L. Rose, Ultrasonic guided waves in solid media, New York: Cambridge university press, 2014.

[7] T. Stratoudaki, M. Clark and P. D. Wilcox, (2016) "Laser induced ultrasonic phased array using full matrix capture data acquisition and total focusing method," Optics Express, vol. 24 (19), pp. 21921-38

[8] P. Lukacs, G. Davis, T. Stratoudaki, Y. Javadi, G. Pierce and A. Gachagan, (2021) "Remote, Volumetric Ultrasonic Imaging of Defects Using Two-Dimensional Laser Induced Phased Arrays," Proceedings of the 2021 48th Annual Review of Progress in Quantitative Nondestructive Evaluation vol. 85529, Virtual, Online. July 28–30, 2021, pp. V001T18A001

[9] Z. Liu, H. Chen, K. Sun, C. He and B. Wu, (2018), "Full non-contact laser-based Lamb waves phased array inspection of aluminum plate," Journal of Visualization, vol. 21 (5), pp. 751-761

[10] F. Li and Y. Luo, (2021), "Total Focusing Method Damage Imaging in Frequency Domain Using Laser-Ultrasonic Lamb Wave Based on Time-domain Filtering in Multi-band," Acta Mechanica Solida Sinica, vol. 34 (3), pp. 404-424

[11] D. A. Hutchins, R. J. Dewhurst and S. B. Palmer, (1981), "Directivity patterns of laser‐generated ultrasound in aluminum," The Journal of the Acoustical Society of America, vol. 70 (5), pp. 1362-1369

Usage Shares
Total Views
156 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage