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Mode mixing in shear horizontal ultrasonic guided waves
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Petcher, P. A. and Dixon, Steve M. (2017) Mode mixing in shear horizontal ultrasonic guided waves. Nondestructive Testing and Evaluation, 32 (2). pp. 113-132. doi:10.1080/10589759.2016.1184268
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Official URL: http://dx.doi.org/10.1080/10589759.2016.1184268
Abstract
SH guided waves are used increasingly for non-destructive testing (NDT) applications, particularly for pipes and pipe supports using circumferentially guided wave modes. In practical implementations, it is not always straightforward to ensure single-mode operation and this requires consideration when interpreting results. During shear horizontal (SH) wave generation or SH guided wave interaction with geometrical changes or defects, multiple SH guided wave modes may be produced, depending on the shear wave speed, the frequency of operation, the thickness of the sample and the transducer characteristics. This paper discusses the interference patterns created as the multiple SH modes mix (for both continuous tone generation and short bursts), and the problems caused by the interference patterns on applications such as NDT. In particular, the patterns can lead to defects being missed during an NDT inspection using SH waves, and a way to circumvent this problem is suggested.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | Ultrasonic waves, Nondestructive testing | ||||||||
| Journal or Publication Title: | Nondestructive Testing and Evaluation | ||||||||
| Publisher: | Taylor & Francis Ltd. | ||||||||
| ISSN: | 1058-9759 | ||||||||
| Official Date: | 2017 | ||||||||
| Dates: |
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| Volume: | 32 | ||||||||
| Number: | 2 | ||||||||
| Number of Pages: | 20 | ||||||||
| Page Range: | pp. 113-132 | ||||||||
| DOI: | 10.1080/10589759.2016.1184268 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||
| Grant number: | EP/I03160X/1 (EPSRC) | ||||||||
| RIOXX Funder/Project Grant: |
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