Stress Intensity Factors for Radial Cracks in a Partially Autofrettaged Thick-Wall Cylinder

Abstract

Using a finite element method and thermal simulation, stress intensity factors are determined for a uniform array of equal depth radial cracks emanating from the internal boundary of a pressurized, autofrettaged thick-wall cylinder. Computations of the stress intensity factors by methods of load relief and weight function are also examined. The combination of finite elements and weight functions is found very effective and is used in this report for multiple-radial cracks in a partially autofrettaged tube. Extensive numerical results are presented for a cylinder having an external diameter twice that of the internal diameter. It is shown that the autofrettaged tube with two diametrically opposed cracks remains, in general, the weakest configuration. For more than two cracks, the higher the number of cracks is, the smaller the stress intensity factor will be.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1981
Accession Number
ADA103208

Entities

People

  • M. A. Hussain
  • 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

  • Crack Tips
  • Diameters
  • Engineering
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Geometry
  • Intensity
  • Internal Pressure
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Mechanics
  • Residual Stress
  • Simulations
  • Stress Intensity Factors
  • Stresses
  • Thick Walls

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.