A simplified creep-reverse plasticity solution method for bodies subjected to cyclic loading

Haofeng Chen, Alan R.S. Ponter

Research output: Contribution to journalArticle

5 Citations (Scopus)
33 Downloads (Pure)

Abstract

An extension of the upper bound shakedown theorem to load histories in excess of shakedown has been applied recently to the evaluation of a ratchet limit and the varying plastic strain magnitudes associated with a varying residual stress field. Solutions were obtained by the Linear Matching Method. In the present paper, this technique is extended to the evaluation of creep-reverse plasticity mechanism for bodies subjected to thermal cyclic loading including creep effects. The accumulated creep strain, the varying flow stress and the corresponding varying residual stress field during a creep dwell time are evaluated as well as the elastic follow-up factor. Three alternative computational strategies are discussed with differing but related assumptions. The problem of a plate with a central circular hole is discussed, subjected to cyclic thermal load. All three methods provide similar values for the elastic follow-up factor, indicating that the result is insensitive to the range of assumptions made. The simplest method, Method 1, is suggested as the basis of a general purpose method for use in life assessment.
Original languageEnglish
Pages (from-to)561-577
Number of pages16
JournalEuropean Journal of Mechanics - A/Solids
Volume23
Issue number4
DOIs
Publication statusPublished - Jul 2004

Keywords

  • cyclic loading
  • creep
  • reverse plasticity
  • elastic follow-up
  • mechanics

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