Predicting Catastrophic Outside Diameter Initiated Fatigue Failure of Thick-Walled Cylinders Using Low Cycle Fatigue Data

Abstract

A procedure is presented to predict fatigue failure of thick-walled cylinders containing discontinuities at the outside diameter (OD). Both crack initiation life and crack growth are considered. The elastic-plastic strains at an OD discontinuity are estimated using elastic analysis and stress concentration factors. The strain estimates are then used in conjunction with low cycle fatigue data to determine the initiation life. Crack growth is estimated by integration of a power law relationship. The results obtained by using this analysis method compared to measured fatigue life data for several OD initiated failures in thick-walled cylinders agrees to within about ten percent.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1985
Accession Number
ADA161805

Entities

People

  • Joseph A. Kapp

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Crack Propagation
  • Cracks
  • Diameters
  • Discontinuities
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • High Pressure
  • Materials
  • Mechanics
  • Military Research
  • Residual Stress
  • Stress Concentration
  • Stress Intensity Factors
  • Stress Strain Relations
  • Stresses
  • Yield Strength

Readers

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