Phenomena in the propagation of ultrasonic vibrations in nickel wire

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dc.contributor.authorCoulter, John Dallawayen_ZA
dc.date.accessioned2016-10-14T06:19:16Z
dc.date.available2016-10-14T06:19:16Z
dc.date.issued1987en_ZA
dc.descriptionBibliography: pages 113-114.en_ZA
dc.description.abstractA 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.en_ZA
dc.identifier.apacitationCoulter, J. D. (1987). <i>Phenomena in the propagation of ultrasonic vibrations in nickel wire</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering. Retrieved from http://hdl.handle.net/11427/22113en_ZA
dc.identifier.chicagocitationCoulter, John Dallaway. <i>"Phenomena in the propagation of ultrasonic vibrations in nickel wire."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1987. http://hdl.handle.net/11427/22113en_ZA
dc.identifier.citationCoulter, J. 1987. Phenomena in the propagation of ultrasonic vibrations in nickel wire. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Coulter, John Dallaway AB - 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. DA - 1987 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1987 T1 - Phenomena in the propagation of ultrasonic vibrations in nickel wire TI - Phenomena in the propagation of ultrasonic vibrations in nickel wire UR - http://hdl.handle.net/11427/22113 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22113
dc.identifier.vancouvercitationCoulter JD. Phenomena in the propagation of ultrasonic vibrations in nickel wire. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Electrical Engineering, 1987 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22113en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Electrical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherUltrasonic wavesen_ZA
dc.subject.otherElectrical Engineeringen_ZA
dc.titlePhenomena in the propagation of ultrasonic vibrations in nickel wireen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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