| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Three-Dimensional Scattering of an Incident Plane Shear Horizontal Guided Wave by a Partly through-Thickness Hole in a Plate |
| Wen-Fa Zhu1,2, Hai-Yan Zhang1**, Jian Xu1, Xiao-Dong Chai2 |
1School of Communication and Information Engineering, Shanghai University, Shanghai 200444
2School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620 |
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| Cite this article: |
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Wen-Fa Zhu, Hai-Yan Zhang, Jian Xu et al 2016 Chin. Phys. Lett. 33 014302 |
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Abstract We investigate the three-dimensional (3D) scattering problem of an incident plane shear horizontal wave by a partly through-thickness hole in an isotropic plate, in which the Lamb wave modes are also included due to the mode conversions by the scattering obstacle in the 3D problem. An analytical model is presented such that the wave fields are expanded in all of propagating and evanescent SH modes and Lamb modes, and the scattered far-fields of three fundamental guided wave modes are analyzed numerically for different sizes of the holes and frequencies. The numerical results are verified by comparing with those obtained by using the approximate Poisson/Mindlin plate model for small hole radius and low frequency. It is also found that the scattering patterns are different from those of the S0 wave incidence. Our work is useful for quantitative evaluation of the plate-like structure by ultrasonic guided waves.
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Received: 10 September 2015
Published: 29 January 2016
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| PACS: |
43.20.+g
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(General linear acoustics)
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43.35.+d
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(Ultrasonics, quantum acoustics, and physical effects of sound)
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