Non-localized creep assessment of V-notched components: a review

P. Gallo, F. Berto*, S. M. J. Razavi, M. R. Ayatollahi

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

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Geometrical discontinues such as notches need to be carefully analysed by engineers because of the stress concentration generated by them. Notches become even more important when the component is subjected, in service, to very severe conditions, such as the high temperature fatigue and imposed visco-plastic behaviour such as creep. The aim of the paper is to present an improvement and extension of the existing notch tip creep stress-strain analysis method developed by Nunez and Glinka, validated for U-notches only, to a wide variety of blunt V-notches. The key in getting the extension to blunt V-notches is the assumption of the generalized Lazzarin-Tovo solution that allows a unified approach to the evaluation of linear elastic stress fields in the neighbourhood of both cracks and notches. Numerous examples have been analysed up to date, and the stress fields obtained according to the proposed method were compared with appropriate finite element data, showing a very good agreement. In view of the promising results, authors are considering possible further extension of the method to sharp V-notches and cracks introducing the concept of the Strain Energy Density (SED). Copyright (C) 2017 The Authors. Published by Elsevier B.V.

Original languageEnglish
Pages (from-to)102-109
Number of pages8
JournalProcedia Structural Integrity
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication
EventItalian Group of Fracture Conference - Urbino, Italy
Duration: 1 Mar 20173 Mar 2017
Conference number: 24


  • Creep
  • V-notches
  • stress fields
  • sress evaluation
  • strain energy density

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