Reliability analysis of structural components utilizing the strain-life method

S. Kandarpa, B. F. Spencer, D. J. Kirkner

Research output: Contribution to journalArticle

Abstract

Traditional strain-life analysis for low-cycle fatigue does not account for the significant random scatter exhibited by the experimental data. In this paper, a stochastic analog of the strain-life approach is presented. The material constants characterizing the strain-life equation are taken to be random variables. The probability of exceeding the random number of cycles to failure for the structural component is then estimated via second order reliability methods. The effect of mean stress on failure probability is included. The problem of a notched specimen subjected to constant amplitude cyclic loading is used to illustrate the approach. Importance factors for the material constants characterizing the problem are analyzed to determine which uncertainties are most significant.

Original languageEnglish (US)
Pages (from-to)761-774
Number of pages14
JournalEngineering Fracture Mechanics
Volume53
Issue number5
DOIs
StatePublished - Mar 1996
Externally publishedYes

ASJC Scopus subject areas

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

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