Structural Fatigue in One-Crack Models with Arbitrary Inspection,

Abstract

The reliability theory for fatigue lives of one-crack, two-stage models with hijacking has been extended to allow for arbitrary inspection intervals with possible arbitrary renewals. The life distribution is similar with a modified initiation density and the associated moment generating function is formally identical. It is possible to identify an unsteady Markov chain formed by the combined fatigue and inspection process. Two FORTRAN programs have been developed from this formulation, one of which allows for random crack rates and run-time setting of inspections.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1979
Accession Number
ADA086722

Entities

People

  • D. G. Ford

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Aeronautical Engineering
  • Aeronautics
  • Aircrafts
  • Attrition
  • Civil Aviation
  • Computer Programs
  • Engineering
  • Engineers
  • Equations
  • Fokker Planck Equations
  • Inspection
  • Markov Chains
  • Markov Processes
  • Mechanical Engineering
  • Probability
  • Reliability
  • Stochastic Processes

Readers

  • Mathematical Modeling and Probability Theory.
  • Operations Research
  • Structural Health Monitoring of Composite Structures.