Linear matching method on the evaluation of cyclic behaviour with creep effect

Haofeng Chen, Weihang Chen, James Michael Ure

Research output: Contribution to conferencePaper

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Abstract

This paper describes a new Linear Matching Method (LMM) technique for the direct evaluation of cyclic behaviour with creep effects of structures subjected to a general load condition in the steady cyclic state. The creep strain and plastic strain range for use in creep damage and fatigue assessments, respectively, are obtained. A benchmark example of a Bree cylinder subjected to cyclic thermal load and constant mechanical load is analysed to verify the applicability of the new LMM to deal with the creep fatigue damage. The cyclic responses for different loading conditions and dwell time periods within the Bree boundary are obtained. To demonstrate the efficiency and effectiveness of the method for more complex structures, a 3D holed plate subjected to cyclic thermal loads and constant axial tension is analysed. The results of both examples show that with the presence of creep the cyclic responses change significantly. The new LMM procedure provides a general purpose technique for the evaluation of cyclic behaviour, the plastic strain range and creep strain for the creep fatigue damage assessment with creep fatigue interaction.
Original languageEnglish
Number of pages32
Publication statusPublished - 15 Jul 2012
EventASME Pressure Vessels and Piping Conference 2012 - Toronto, Canada
Duration: 15 Jul 201220 Jul 2012

Conference

ConferenceASME Pressure Vessels and Piping Conference 2012
CountryCanada
CityToronto
Period15/07/1220/07/12

Keywords

  • creep
  • fatigue
  • creep ratcheting
  • direct method

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