A Computer Program to Calculate Growth Rates for Cracks at Notches in Regions of Residual Stress

Abstract

This Memorandum describes a computer program which can be used to predict the growth rates of fatigue cracks emanating from notches and growing through residual stress fields. The residual stress distributions, alternating loading conditions and specimen geometry must be specified by the user. The program uses a Green's function technique to calculate the stress intensity factor due to the applied and residual stresses for any crack length. The calculated stress intensity factor can be corrected to account for the exact crack shape, if it is known. The crack growth rate is obtained from a database of experimentally determined crack growth data as a function of stress intensity factor, for a number of different materials.... Fatigue, Crack, Prediction, Program, Fracture mechanics, Residual stress, Cold expansion

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1992
Accession Number
ADA262048

Entities

People

  • D. P. Rooke
  • R. Cook
  • S. Dorey

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Aspect Ratio
  • Boundaries
  • Computer Programs
  • Computers
  • Crack Propagation
  • Crack Tips
  • Experimental Data
  • Fracture (Mechanics)
  • Geometry
  • Hard Copy
  • Mechanics
  • Numerical Integration
  • Residual Stress
  • Stress Intensity Factors
  • Stresses
  • Weighting Functions

Readers

  • Approximation Theory.
  • Materials Science (Mechanical Engineering).