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Phenomena in the propagation of ultrasonic vibrations in nickel wire
Bibliography: pages 113-114.
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| Format: | Thesis |
| Language: | English |
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Department of Electrical Engineering
2016
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| _version_ | 1867613323518803968 |
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| access_status_str | Open Access |
| author | Coulter, John Dallaway |
| author_browse | Coulter, John Dallaway |
| author_facet | Coulter, John Dallaway |
| author_sort | Coulter, John Dallaway |
| collection | Thesis |
| description | Bibliography: pages 113-114. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/22113 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:17.944Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Electrical Engineering |
| publisherStr | Department of Electrical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/22113 Phenomena in the propagation of ultrasonic vibrations in nickel wire Coulter, John Dallaway Ultrasonic waves Electrical Engineering Bibliography: pages 113-114. A wave-train-echo technique, with repeated forward-and-return travels of the signal, was used to study the propagation of ultrasonic waves in nickel wire. In particular, the origin of often observed anomalous waves in nickel wire was investigated. A possible explanation of an aspect of the phenomenon was devised. During continuing investigation of the phenomenon of anomalous waves, an unexpected effect of stress on the attenuation of ultrasonic waves in annealed nickel wire was observed. Attention was transferred to the new phenomenon, and extensive experimental work carried out to measure the effects of direct and flexural stress on the attenuation. The effect was found to occur with torsional stress also. Computer-aided determinations of attenuation were made from the experimental readings of signal strength for variations of stress and signal frequency. A detailed study and documentation of known processes of attenuation of acoustic vibrations in solids was made. Indications of the nature of the mechanism of stress-dependent attenuation have been sought, and a tentative conclusion arrived at. 2016-10-14T06:19:16Z 2016-10-14T06:19:16Z 1987 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/22113 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Ultrasonic waves Electrical Engineering Coulter, John Dallaway Phenomena in the propagation of ultrasonic vibrations in nickel wire |
| thesis_degree_str | Master's |
| title | Phenomena in the propagation of ultrasonic vibrations in nickel wire |
| title_full | Phenomena in the propagation of ultrasonic vibrations in nickel wire |
| title_fullStr | Phenomena in the propagation of ultrasonic vibrations in nickel wire |
| title_full_unstemmed | Phenomena in the propagation of ultrasonic vibrations in nickel wire |
| title_short | Phenomena in the propagation of ultrasonic vibrations in nickel wire |
| title_sort | phenomena in the propagation of ultrasonic vibrations in nickel wire |
| topic | Ultrasonic waves Electrical Engineering |
| url | http://hdl.handle.net/11427/22113 |
| work_keys_str_mv | AT coulterjohndallaway phenomenainthepropagationofultrasonicvibrationsinnickelwire |