Xianglin Zhan, Limingheng Sun. Detection of Crack Parameters of Aluminum Plates Based on Nonlinear Ultrasonic[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1716002
- Laser & Optoelectronics Progress
- Vol. 58, Issue 17, 1716002 (2021)
Fig. 1. Lamb wave dispersion curves. (a) Phase velocity curves; (b) group velocity curves
Fig. 2. Finite element model
Fig. 3. Comparison chart of received signals for non-destructive and damaged plates
Fig. 4. Signal frequency domain diagrams. (a) Non-destructive plate spectrogram; (b) spectrogram of damaged plate
Fig. 5. Received signal time-frequency domain diagrams. (a) Time-frequency domain diagram of non-destructive plate; (b) time-frequency domain diagram of damaged plate
Fig. 6. β fitting curve with crack length
Fig. 7. β fitting curve with crack width
Fig. 8. Crack simulation comparison. (a) Straight crack simulation cloud map; (b) 45° crack simulation cloud map
Fig. 9. Simulation diagram
Fig. 10. Harmonic signal comparison. (a) p2 probe extraction signal comparison at 0° and 15°; (b) p1 probe extraction signal comparison at 0° and 15°; (c) p3 probe extraction signal comparison at 0° and 15°; (d) comparison of signals extracted from three receiving points at 15°
Fig. 11. β fitting curves of p1, p2 and p3 probes extraction signals
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Table 1. Test results at 17°
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Table 2. Test results at 58°
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