The effect of elliptical-front crack shape on the breathing mechanism of a crack in a rotating shaft

Joseph P. Spagnol, Helen Wu

Research output: Chapter in Book / Conference PaperConference Paperpeer-review

Abstract

![CDATA[Examining the cross-section of a shaft that has ruptured due to fatigue often reveals beach markings that can be approximated as being elliptical in shape; as such, the front of a crack can be modelled as an ellipse. In this study, an existing elliptical crack model was improved upon to study cracks with a range of elliptical-front crack curvatures. The area moments of inertia of the total uncracked area of the shaft were calculated for a number of crack depths and crack curvatures, where it was seen that cracks with greater curvature resulted in stiffer shaft models. The development of the area moment of inertia models serve as a preliminary step for obtaining the time-varying stiffness matrix of cracked shafts with differing crack curvature and to consequently obtain the dynamic behaviour of these rotor systems.]]
Original languageEnglish
Title of host publicationProceedings of Acoustics 2016: The Second Australasian Acoustical Societies Conference, 9-11 November 2016, Brisbane, Queensland, Australia
PublisherThe Australian Acoustical Society Queensland Division
Number of pages10
ISBN (Print)9780909882266
Publication statusPublished - 2016
EventAustralian Acoustical Society. Conference -
Duration: 9 Nov 2016 → …

Conference

ConferenceAustralian Acoustical Society. Conference
Period9/11/16 → …

Keywords

  • cracks
  • shafts
  • vibration

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