Effects of R-Ratio on Crack Initiation at External Discontinuities in Autofrettaged Cylinders

Abstract

Experimental work shows the effects of positive stress ratios, or tensile minimum stress, during the fatigue cycle on the fatigue crack initiation from holes. This simulates the effect of the residual tensile stresses at the outside surface of autofrettaged cylinders. S-N (stress life) curves and modified Goodman diagrams are shown for fatigue crack initiation.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1982
Accession Number
ADA120716

Entities

People

  • Robert R. Fujczak

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Engineering
  • Equations
  • Fatigue Life
  • Internal Pressure
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Pressurization
  • Residual Stress
  • Residuals
  • Stress Analysis
  • Stress Concentration
  • Stresses
  • Tensile Strength
  • Tensile Stress

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science (Mechanical Engineering).
  • Structural Health Monitoring of Composite Structures.