Transient elastic-plastic-creep crack-tip stress fields under load-controlled loading

H. S. Lee, D. J. Kim, Yun-Jae Kim, R. A. Ainsworth, P. J. Budden

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper presents transient and steady-state elastic-plastic-creep crack-tip stress fields under load-controlled loading conditions for a wide range of combinations of power-law plastic and creep materials. The crack-tip stress fields are characterized in terms of 2 parameters to accommodate the crack-tip constraint effect; the C(t)- (or C*-) integral and the βQ parameter (the Q-parameter normalized with respect to the proximity parameter to plastic collapse). For practical application, the crack-tip stress fields are re-formulated explicitly in terms of time and crack-tip stress fields for elastic-plastic and steady-state creep conditions. Comparison with detailed FE results for plane strain tension and bend specimens shows that this formulation of the crack-tip stress fields agrees well with finite element results.

Original languageEnglish
Pages (from-to)949-965
Number of pages17
JournalFatigue and Fracture of Engineering Materials and Structures
Volume41
Issue number4
DOIs
Publication statusPublished - 2018 Apr 1

Keywords

  • crack-tip constraint
  • crack-tip stress fields
  • elastic-plastic-creep condition
  • transient creep conditions

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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