Development of an optimal piezoelectric transducer to excite guided waves in a rail web

Ramatlo, Dineo Anna; Wilke, Daniel Nicolas; Loveday, Philip W.

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dc.contributor.author	Ramatlo, Dineo Anna
dc.contributor.author	Wilke, Daniel Nicolas
dc.contributor.author	Loveday, Philip W.
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.subject.other	Engineering, built environment and information technology articles SDG-09
dc.subject.other	SDG-09: Industry, innovation and infrastructure
dc.subject.other	Engineering, built environment and information technology articles SDG-11
dc.subject.other	SDG-11: Sustainable cities and communities
dc.subject.other	Engineering, built environment and information technology articles SDG-12
dc.subject.other	SDG-12: Responsible consumption and production
dc.title	Development of an optimal piezoelectric transducer to excite guided waves in a rail web	en_ZA
dc.type	Postprint Article	en_ZA