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| dc.contributor.author | Ramatlo, Dineo Anna
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| dc.contributor.author | Wilke, Daniel Nicolas
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| dc.contributor.author | Loveday, Philip W.
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| dc.date.accessioned | 2018-03-12T12:46:20Z | |
| dc.date.issued | 2018-04 | |
| dc.description.abstract | Ultrasonic transducers have demonstrated the ability to effectively excite guided waves that can propagate over long distances and are thus employed in monitoring systems. An ultrasonic piezoelectric transducer that strongly excites a mode travelling in the web of the rail is required to detect cracks in the rail web. A numerical method referred to as the Coupled Semi-Analytical Finite Element - 3 Dimensional Finite Element (Coupled SAFE-3DFE) method is employed to model the excitation of guided waves in a rail by a transducer. The aim of this study is to demonstrate that the Coupled SAFE-3DFE method used in conjunction with mathematical optimization methods, can automate the optimal design of a transducer. The optimal transducer was constructed and experimental measurements were found to agree with the predicted performance. | en_ZA |
| dc.description.department | Mechanical and Aeronautical Engineering | en_ZA |
| dc.description.embargo | 2019-04-01 | |
| dc.description.librarian | hj2018 | en_ZA |
| dc.description.uri | http://www.elsevier.com/locate/ndteint | en_ZA |
| dc.identifier.citation | Ramatlo, D.A., Wilke, D.N. & Loveday, P.W. 2018, 'Development of an optimal piezoelectric transducer to excite guided waves in a rail web', NDT & E International, vol. 95, pp. 72-81. | en_ZA |
| dc.identifier.issn | 0963-8695 (print) | |
| dc.identifier.issn | 1879-1174 (online) | |
| dc.identifier.other | 10.1016/j.ndteint.2018.02.002 | |
| dc.identifier.uri | http://hdl.handle.net/2263/64219 | |
| dc.language.iso | en | en_ZA |
| dc.publisher | Elsevier | en_ZA |
| dc.rights | © 2018 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in NDT and E International. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in NDT and E International, vol. 95, pp. 72-81, 2018. doi : 10.1016/j.ndteint.2018.02.002. | en_ZA |
| dc.subject | Coupled semi-analytical finite element - 3 dimensional finite element (Coupled SAFE-3DFE) | en_ZA |
| dc.subject | Guided waves | en_ZA |
| dc.subject | Piezoelectric transducer | en_ZA |
| dc.subject | Optimization | en_ZA |
| dc.subject | Response surface | en_ZA |
| dc.subject | Finite element method | en_ZA |
| dc.subject | Guided electromagnetic wave propagation | en_ZA |
| dc.subject | Numerical methods | en_ZA |
| dc.subject | Piezoelectricity | en_ZA |
| dc.subject | Transducers | en_ZA |
| dc.subject | Ultrasonic applications | en_ZA |
| dc.subject | Ultrasonic transducers | en_ZA |
| dc.subject | Rail webs | en_ZA |
| dc.subject | Predicted performance | en_ZA |
| dc.subject | Optimal design | en_ZA |
| dc.subject | Monitoring system | en_ZA |
| dc.subject | Mathematical optimizations | en_ZA |
| dc.subject | 3-dimensional | en_ZA |
| dc.title | Development of an optimal piezoelectric transducer to excite guided waves in a rail web | en_ZA |
| dc.type | Postprint Article | en_ZA |
