Stress Intensity Factors at Radial Cracks of Unequal Depth in Partially Autofrettaged, Pressurized Cylinders

Abstract

Stress intensity factors are estimated for radial cracks of unequal depths emanating from the inner surface of a partially autofrettaged cylinder subjected to various bore pressures. The approximate method developed for uneven radial cracks in a non-autofrettaged cylinder is applied to functional stress intensities. Linear superposition is then used to obtain the final stress intensity factors of uneven cracks due to a stress field which varies with the magnitude of bore pressure, the degree of autofrettage, and the elastic-plastic behavior of the cylinder material. The autofrettage residual stress reduces the level of stress intensity factors at inner radial cracks due to internal pressure, but has little effect on variations in stress intensity factors caused by changes in crack depth.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1985
Accession Number
ADA157866

Entities

People

  • S. L. Pu

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Autofrettage
  • Crack Tips
  • Hardening
  • Internal Pressure
  • Materials
  • Mechanics
  • Military Research
  • Numerical Analysis
  • Pressure Vessels
  • Residual Stress
  • Residuals
  • Strain Hardening
  • Stress Intensity Factors
  • Stress Strain Relations
  • Stresses
  • Temperature Gradients
  • Weapons

Fields of Study

  • Engineering

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.