| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Characterization of inner layer thickness change of a composite circular tube using nonlinear circumferential guided wave:A feasibility study |
| Ming-Liang Li(李明亮)1, Guang-Jian Gao(高广健)2, and Ming-Xi Deng(邓明晰)1,† |
1 College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;
2 Army Logistics University, Chongqing 401331, China |
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Abstract The feasibility of using the nonlinear effect of primary circumferential guided wave (CGW) propagation for characterizing the change of inner layer thickness of a composite circular tube (CCT) has been investigated. An appropriate mode pair of the fundamental and double-frequency CGWs (DFCGWs) has been selected to enable the second harmonics of primary wave mode in the given CCT to accumulate along the circumferential direction. When changes in the inner layer thickness (described as the equivalent inner layer thickness) take place, the corresponding nonlinear CGW measurements are conducted. It is found that there is a direct correlation between change of equivalent inner layer thickness of the CCT and the relative acoustic nonlinearity parameter (Δβ) measured with CGWs propagating through one full circumference, and that the effect of second-harmonic generation (SHG) is very sensitive to change in the inner layer thickness. The experimental result obtained demonstrates the feasibility for quantitatively assessing the change of equivalent inner layer thickness in CCTs using the effect of SHG by primary CGW propagation.
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Received: 12 December 2020
Revised: 27 January 2021
Accepted manuscript online: 02 February 2021
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PACS:
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43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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43.25.+y
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(Nonlinear acoustics)
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43.20.Mv
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(Waveguides, wave propagation in tubes and ducts)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12074050, 11834008, and 11704410). |
Corresponding Authors:
Ming-Xi Deng
E-mail: dengmx65@yahoo.com
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Cite this article:
Ming-Liang Li(李明亮), Guang-Jian Gao(高广健), and Ming-Xi Deng(邓明晰) Characterization of inner layer thickness change of a composite circular tube using nonlinear circumferential guided wave:A feasibility study 2021 Chin. Phys. B 30 084301
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