Linear matching method for creep rupture assessment

Haofeng Chen, M.J. Engelhardt, Alan R.S. Ponter

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The recently developed Linear Matching Method (LMM), which is easily implemented within commercial FE codes, has been successfully used to evaluate elastic and plastic shakedown loads [1-7]. In this paper, the method is extended to the prediction of the creep rupture life of a structure, based upon a bounding method currently used in the life assessment method R5. The method corresponds to the requirement that, for the operating load history, the structure should shakedown where the yield stress is given by the lesser of the plastic yield stress and a high temperature rupture stress corresponding to a rupture time. A holed plate subjected to cyclic thermal load and constant mechanical load is assessed in detail as a typical example to confirm the applicability of the above procedures. The examples show that the method remains numerically stable, even when the method is inverted.
Original languageEnglish
Pages (from-to)213-220
Number of pages7
JournalInternational Journal of Pressure Vessels and Piping
Volume80
DOIs
Publication statusPublished - 2003

Keywords

  • linear matching
  • shakedown
  • creep rupture
  • materials science

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