Monte Carlo Simulation of CreepFatigue Small Cracks Based on a Three-Dimensional Model of Random Fracture Resistance of Grain Boundaries

Naoya Tada, Takayuki Kitamura, Ryuichi Ohtani

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Numerical simulation was conducted on the initiation and growth of multiple small cracks under creep-fatigue condition based on a three-dimensional stochastic model. It was assumed in the model that (1) (quasi) three-dimensional polycrystal grains were numerically generated on the basis of an isotropic grain growth model; (2) the fracture driving force on each grain boundary was given as a function of the grain boundary’s angle to the stress axis; (3) each grain had a different fracture resistance, and (4) cracks did not initiate and grow inside the stress relaxation zone of the preexistent crack. Crack density, angle of an initiated crack, crack propagation rate, and cumulative probability of crack length were examined by the simulation. As a result, they coincide well with the experimental observation of Type 304 stainless steel under slow-fast fatigue at 923 K in a vacuum.

Original languageEnglish
Pages (from-to)708-714
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume56
Issue number524
DOIs
Publication statusPublished - Jan 1 1990
Externally publishedYes

Keywords

  • 304 Stainless Steel
  • Crack Propagation
  • Fatigue at Elevated Temperature
  • Monte Carlo Simulation
  • Probabilistic Method
  • Random Fracture Resistance
  • Small Crack
  • Three-Dimensional Model

ASJC Scopus subject areas

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

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