FE analysis of a notched bar under thermomechanical fatigue using a unified viscoplasticity model

D. W. J. Tanner*, W. Sun, T. H. Hyde

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

6 Citations (Scopus)


Z-mat software is used to implement the multiaxial form of the Chaboche unified viscoplastic constitutive equations into the Abaqus finite element (FE) code. Complex transient stress fields within a grade P91 steel notched bar specimen are investigated in detail for different thermomechanical fatigue (TMF) loading conditions. The results of this work can be used to determine suitable test conditions for notched specimens by providing predictions of the stress-strain history local to the notch. In future, such tests will be used along with the FE analyses to develop and validate multiaxial TMF lifing models.

Original languageEnglish
Pages (from-to)1081-1086
Number of pages6
JournalProcedia Engineering
Publication statusPublished - 2011


  • finite element analysis
  • notched specimen
  • creep
  • Chaboche unified viscoplasticity
  • multiaxial TMF

Cite this