Probabilistic Analysis of the Relationships between the Distribution of Creep Cavities and Creep Damage Parameters

Naoya Tada, Takayuki Kitamura, Ryuichi Ohtani

Research output: Contribution to journalArticle

Abstract

Analytical discussion was given on the relationships between actual cavity distribution and creep damage parameters such as volume fraction of cavities, effective cross-sectional area and the ‘A’ parameter. The relationships between cavity distribution and these damage parameters were derived using a very simple probabilistic model where creep cavities on a grain boundary facet were initiated and grew, depending only on the macroscopic stress (or strain rate) acting on the facet. The exact relationships were represented by Eqs. (16), (20) [or (23)] and (26), respectively. These expressions take into account the effect of the size and direction of grain boundary facets. Damage evolution during creep and creep-fatigue can be calculated using these equations.

Original languageEnglish
Pages (from-to)2074-2080
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume59
Issue number565
DOIs
Publication statusPublished - Jan 1 1993
Externally publishedYes

Keywords

  • Cavity Volume Fraction
  • Creep
  • Creep Cavity
  • Damage Mechanics
  • Effective Cross-Sectional Area
  • Probabilistic Method
  • ‘A’ Parameter

ASJC Scopus subject areas

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

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