Variability in Component Life Due to Fatigue Crack Growth Variability (Preprint)

Abstract

The variation in component damage tolerance life is assessed in terms of the variation in crack growth rate using a cycle by cycle integration technique. The results of a fatigue crack growth rate interlaboratory study are reanalyzed in order to predict the life of a component-like structure. It was determined that the variability in crack growth rate is fundamentally the same as the variability in the predicted fracture mechanics life for 4130 steel, and the aluminum alloys 2024-T351 and 7075-T6. Through only a limited K range able to be examined, it appears that the match of the variability of crack growth rate and component life is relatively independent of the range of K used in the comparison.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2008
Accession Number
ADA489285

Entities

People

  • A. H. Rosenberger

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Damage
  • Damage Tolerance
  • Data Sets
  • Fracture (Mechanics)
  • Manufacturing
  • Materials
  • Mechanics
  • Metals
  • Military Research
  • Thickness
  • United States

Readers

  • Coastal Oceanography
  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).