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Evaluation of the Interface Between Two Plates by the Lamb Wave |
| WANG Xiao-Min;LIAN Guo-Xuan;LI Ming-Xuan |
| Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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WANG Xiao-Min, LIAN Guo-Xuan, LI Ming-Xuan 2001 Chin. Phys. Lett. 18 1483-1486 |
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Abstract A new expression of the dispersion equation of the Lamb wave in an adhesive two-layered plate is presented. The bond rigidity of the adhesive plate is accounted for in terms of a spring model. The influence of the variations of the compliance constants of the spring on the dispersion feature of Lamb modes is numerically studied. The numerical results indicate that the deterioration of the bond rigidity may cause the phase velocity decrease and the frequency-shift for a given Lamb mode, thus having a possibility for the evaluation of the bonding state of the adhesive plate by using ultrasonic wave velocity measurement. The phase-tracing method is used to measure the phase velocities experimentally and the results for an adhesive plate of aluminum-aluminum are given to verify the theoretical predictions.
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| Keywords:
43.35.+d
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Published: 01 November 2001
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| PACS: |
43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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