Method for Evaluation of Remaining Life in High Temperature Component Based on Numerical Simulation of Small Crack Initiation and Growth in Creep-Fatigue

Takayuki Kitamura, Naoya Tada, Ryuichi Ohtani

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to achieve the objective of securing the reliability of high-temperature components, it is necessary to establish a method for predicting the remaining life of their materials subjected to severe creep-fatigue damage. It was reported by the authors that multiple small cracks initiated along grain boundaries on the specimen surface at the very early stage of life in creep-fatigue and their growth and coalescence formed the main crack which induced the failure. Moreover, the process of small crack initiation and growth showed random behavior due to microstructural inhomogeneity. A stochastic model was proposed and the failure process was numerically simulated by means of the Monte Carlo method. This paper provides a scheme of the small-crack-simulation-method for the evaluation of remaining life of the materials in high-temperature components, which is an integration of our previous studies and is summarized in a flow chart.

Original languageEnglish
Pages (from-to)1732-1737
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume57
Issue number540
DOIs
Publication statusPublished - Jan 1 1991
Externally publishedYes

Keywords

  • Crack Initiation
  • Crack Propagation (Crack Growth)
  • Creep
  • Creep-Fatigue
  • Fatigue at High Temperature
  • High-Temperature Component
  • Life Assessment
  • Life Prediction
  • Numerical Simulation
  • Remaining Life
  • Small Crack

ASJC Scopus subject areas

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

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