Stress Intensity Factors for Radial Cracks at Outer Surface of a Partially Autofrettaged Cylinder Subjected to Internal Pressure

Abstract

The functional stress intensity factor approach which combines the finite element, thermal simulation and weight function methods developed for the computation of stress intensity factors for multiple-radial cracks at the inner surface of a partially autofrettaged cylinder is applied in this report to external cracks. Numerical results of stress intensity factors are obtained for a cylinder with outer diameter twice the inner diameter. A slight increase in the degree of autofrettage will increase stress intensity factors of inner cracks slightly but will decrease stress intensity factors of external cracks considerably. As in the inner crack case, the cylinder with two diametrically opposed external cracks is in general the weakest configuration and for more than two cracks, the stress intensity factor decreases as the number of external cracks increases.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1982
Accession Number
ADA116396

Entities

People

  • S. L. Pu

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Computations
  • Crack Tips
  • Equations
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • Internal Pressure
  • Materials
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Residual Stress
  • Simulations
  • Stress Intensity Factors
  • Stresses
  • Thermal Stresses
  • Thick Walls

Fields of Study

  • Engineering

Readers

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