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Interaction of SH guided waves with wall thinning
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Kubrusly, Alan C., Freitas, Miguel A., von der Weid, Jean Pierre and Dixon, Steve M. (2019) Interaction of SH guided waves with wall thinning. NDT & E International, 101 . pp. 94-103. doi:10.1016/j.ndteint.2018.10.007 ISSN 0963-8695.
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WRAP-Interaction-SH-guided-waves-wall-thinning-Dixon-2018.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (2244Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.ndteint.2018.10.007
Abstract
This paper investigates through experiment and finite element modelling, the interaction and mode conversion phenomenon of SH0 and SH1 guided wave modes on a metal plate with machined wall thinning. Quantitative analysis was performed by calculating the reflection and transmission coefficients at the leading and trailing linearly tapered edges, for incident SH0 and SH1 modes. Several geometries were evaluated by varying the taper length and depth. Experiments were performed with periodic permanent magnet array EMATs as transmitters and receivers, generating a single SH mode, whilst both SH0 and SH1 are received. Experimental and numerical data show good agreement, revealing that the interaction of SH guided waves with such defects is complex when mode conversion arises. The values of the reflection and transmission coefficients are non-monotonic along the thinning depth and edge angle ranges. The quantitative results provide insight into the capabilities and limitations of guided SH wave measurements for simple corrosion type defects, indicating that with current capabilities, inspection of real defects will be limited to screening type measurements rather than detailed quantification of the defect region.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Nondestructive testing, Sheet-metal -- Nondestructive testing, Ultrasonic testing, Wave guides, Electroacoustic transducers, Permanent magnets, Electromagnetic waves -- Transmission | ||||||||
| Journal or Publication Title: | NDT & E International | ||||||||
| Publisher: | Elsevier Sci Ltd. | ||||||||
| ISSN: | 0963-8695 | ||||||||
| Official Date: | 2019 | ||||||||
| Dates: |
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| Volume: | 101 | ||||||||
| Page Range: | pp. 94-103 | ||||||||
| DOI: | 10.1016/j.ndteint.2018.10.007 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 2 November 2018 | ||||||||
| Date of first compliant Open Access: | 24 October 2019 | ||||||||
| RIOXX Funder/Project Grant: |
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